84752644 divided by 643 
The aim is to understand the frequency of 643 in 84752644.

Advancing to step 1:
643 goes into 8 0 times with a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Take the next digit (4) from the dividend and append it to 8, then repeat: 84 / 643

Step 2:
If we divide 84 by 643, we get 0 and a remainder of 84.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 84 to get 84.
Fetch the next digit (7) from the dividend, attach it to 84 and continue: 847 / 643

Advancing to step 3:
643 goes into 847 1 times with a remainder of 204.
The next digit of our result is 1. 
Result so far: 1.0
Subtract 643 from 847 to get 204.
Include the next digit (5) from the dividend after 204, then repeat: 2045 / 643

Step 4:
2045 divided by 643 is 3 with a remainder of 116.
The next digit of our result is 3. 
Result so far: 13.0
Subtract 1929 from 2045 to get 116.
Bring next digit (2) of the dividend behind the 116 and repeat the process: 1162 / 643

Step 5:
The number 643 fits into 1162 1 times, leaving a remainder of 519.
Record the quotient 1 as the next digit in the result. 
Result so far: 131.0
Subtract 643 from 1162 to get 519.
Include the next digit (6) from the dividend after 519, then repeat: 5196 / 643

Going ahead to step 6:
The number 643 fits into 5196 8 times, leaving a remainder of 52.
Record the quotient 8 as the next digit in the result. 
Result so far: 1318.0
Subtracting 5144 from 5196 leaves us with 52.
Take the next digit (4) from the dividend and append it to 52, then repeat: 524 / 643

Going ahead to step 7:
643 goes into 524 0 times with a remainder of 524.
Record the quotient 0 as the next digit in the result. 
Result so far: 13180.0
Deduct 0 from 524 and we're left with 524.
Append the next digit (4) from the dividend to 524 and continue with: 5244 / 643

Advancing to step 8:
If we divide 5244 by 643, we get 8 and a remainder of 100.
Put 8 as the next digit of the answer. 
Result so far: 131808.0
If we take 5144 away from 5244, we end up with 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Advancing to step 9:
If we divide 1000 by 643, we get 1 and a remainder of 357.
The number 1 becomes the next digit in our result. 
Result so far: 131808.1
If we subtract 643 from 1000, we get 357.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3570, and continue the process.

On to step 10:
The number 643 fits into 3570 5 times, leaving a remainder of 355.
Use 5 as the next digit of our solution. 
Result so far: 131808.15
Subtracting 3215 from 3570 leaves us with 355.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3550, and continue the process.

Moving on to step 11:
3550 divided by 643 is 5 with a remainder of 335.
Use 5 as the next digit of our solution. 
Result so far: 131808.155
If we take 3215 away from 3550, we end up with 335.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3350, and continue the process.

The final outcome is 131808.155, with a leftover of 0.0335.