We look at the division of 82258555 by 643 
The aim is to understand the frequency of 643 in 82258555.

Moving on to step 1:
If we divide 8 by 643, we get 0 and a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Grab the next digit (2) from the dividend, add it to 8, then carry on: 82 / 643

Let's proceed to step 2:
643 goes into 82 0 times with a remainder of 82.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 82 after subtracting 0 from 82.
Grab the next digit (2) from the dividend, add it to 82, then carry on: 822 / 643

Going ahead to step 3:
643 can be fit into 822 1 times, resulting in a remainder of 179.
Use 1 as the next digit of our solution. 
Result so far: 1.0
The remainder is 179 after subtracting 643 from 822.
Bring next digit (5) of the dividend behind the 179 and repeat the process: 1795 / 643

Let's proceed to step 4:
643 goes into 1795 2 times with a remainder of 509.
Record the quotient 2 as the next digit in the result. 
Result so far: 12.0
Subtracting 1286 from 1795 leaves us with 509.
Include the next digit (8) from the dividend after 509, then repeat: 5098 / 643

On to step 5:
643 can be fit into 5098 7 times, resulting in a remainder of 597.
The number 7 becomes the next digit in our result. 
Result so far: 127.0
Subtracting 4501 from 5098 leaves us with 597.
Include the next digit (5) from the dividend after 597, then repeat: 5975 / 643

Going ahead to step 6:
643 can be fit into 5975 9 times, resulting in a remainder of 188.
Put 9 as the next digit of the answer. 
Result so far: 1279.0
If we take 5787 away from 5975, we end up with 188.
Take the next digit (5) from the dividend and append it to 188, then repeat: 1885 / 643

Moving on to step 7:
643 goes into 1885 2 times with a remainder of 599.
Use 2 as the next digit of our solution. 
Result so far: 12792.0
If we take 1286 away from 1885, we end up with 599.
Take the next digit (5) from the dividend and append it to 599, then repeat: 5995 / 643

Moving on to step 8:
The number 643 fits into 5995 9 times, leaving a remainder of 208.
Put 9 as the next digit of the answer. 
Result so far: 127929.0
Subtracting 5787 from 5995 leaves us with 208.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2080, and continue the process.

Moving on to step 9:
The number 643 fits into 2080 3 times, leaving a remainder of 151.
The next digit of our result is 3. 
Result so far: 127929.3
If we subtract 1929 from 2080, we get 151.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1510, and continue the process.

On to step 10:
When dividing 1510 by 643, we get 2 with a remainder of 224.
Put 2 as the next digit of the answer. 
Result so far: 127929.32
If we subtract 1286 from 1510, we get 224.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2240, and continue the process.

On to step 11:
643 can be fit into 2240 3 times, resulting in a remainder of 311.
Use 3 as the next digit of our solution. 
Result so far: 127929.323
The remainder is 311 after subtracting 1929 from 2240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3110, and continue the process.

Let's proceed to step 12:
When dividing 3110 by 643, we get 4 with a remainder of 538.
Use 4 as the next digit of our solution. 
Result so far: 127929.3234
If we subtract 2572 from 3110, we get 538.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5380, and continue the process.

Moving on to step 13:
The number 643 fits into 5380 8 times, leaving a remainder of 236.
Put 8 as the next digit of the answer. 
Result so far: 127929.32348
If we subtract 5144 from 5380, we get 236.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2360, and continue the process.

Step 14:
643 can be fit into 2360 3 times, resulting in a remainder of 431.
The number 3 becomes the next digit in our result. 
Result so far: 127929.323483
If we take 1929 away from 2360, we end up with 431.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4310, and continue the process.

Advancing to step 15:
643 can be fit into 4310 6 times, resulting in a remainder of 452.
Put 6 as the next digit of the answer. 
Result so far: 127929.3234836
The remainder is 452 after subtracting 3858 from 4310.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4520, and continue the process.

Advancing to step 16:
The number 643 fits into 4520 7 times, leaving a remainder of 19.
Put 7 as the next digit of the answer. 
Result so far: 127929.32348367
Subtracting 4501 from 4520 leaves us with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

After the division, we end up with 127929.32348367 and a remainder of 1.9e-08.