64022577 divided by 643 
The aim is to understand the frequency of 643 in 64022577.

Advancing to step 1:
643 goes into 6 0 times with a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Take the next digit (4) from the dividend and append it to 6, then repeat: 64 / 643

On to step 2:
If we divide 64 by 643, we get 0 and a remainder of 64.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 64 to get 64.
Fetch the next digit (0) from the dividend, attach it to 64 and continue: 640 / 643

Let's proceed to step 3:
The number 643 fits into 640 0 times, leaving a remainder of 640.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 640 leaves us with 640.
Include the next digit (2) from the dividend after 640, then repeat: 6402 / 643

Moving on to step 4:
The number 643 fits into 6402 9 times, leaving a remainder of 615.
Use 9 as the next digit of our solution. 
Result so far: 9.0
Subtract 5787 from 6402 to get 615.
Take the next digit (2) from the dividend and append it to 615, then repeat: 6152 / 643

Let's proceed to step 5:
If we divide 6152 by 643, we get 9 and a remainder of 365.
Put 9 as the next digit of the answer. 
Result so far: 99.0
The remainder is 365 after subtracting 5787 from 6152.
Bring next digit (5) of the dividend behind the 365 and repeat the process: 3655 / 643

Advancing to step 6:
If we divide 3655 by 643, we get 5 and a remainder of 440.
Put 5 as the next digit of the answer. 
Result so far: 995.0
If we subtract 3215 from 3655, we get 440.
Bring next digit (7) of the dividend behind the 440 and repeat the process: 4407 / 643

Step 7:
The number 643 fits into 4407 6 times, leaving a remainder of 549.
Use 6 as the next digit of our solution. 
Result so far: 9956.0
Deduct 3858 from 4407 and we're left with 549.
Include the next digit (7) from the dividend after 549, then repeat: 5497 / 643

Step 8:
643 goes into 5497 8 times with a remainder of 353.
The number 8 becomes the next digit in our result. 
Result so far: 99568.0
Deduct 5144 from 5497 and we're left with 353.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3530, and continue the process.

Going ahead to step 9:
When dividing 3530 by 643, we get 5 with a remainder of 315.
Record the quotient 5 as the next digit in the result. 
Result so far: 99568.5
If we subtract 3215 from 3530, we get 315.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3150, and continue the process.

Going ahead to step 10:
643 goes into 3150 4 times with a remainder of 578.
Put 4 as the next digit of the answer. 
Result so far: 99568.54
Subtracting 2572 from 3150 leaves us with 578.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5780, and continue the process.

Going ahead to step 11:
5780 divided by 643 is 8 with a remainder of 636.
The number 8 becomes the next digit in our result. 
Result so far: 99568.548
Deduct 5144 from 5780 and we're left with 636.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6360, and continue the process.

Going ahead to step 12:
6360 divided by 643 is 9 with a remainder of 573.
Put 9 as the next digit of the answer. 
Result so far: 99568.5489
Deduct 5787 from 6360 and we're left with 573.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5730, and continue the process.

Going ahead to step 13:
643 goes into 5730 8 times with a remainder of 586.
The next digit of our result is 8. 
Result so far: 99568.54898
Deduct 5144 from 5730 and we're left with 586.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5860, and continue the process.

On to step 14:
When dividing 5860 by 643, we get 9 with a remainder of 73.
The number 9 becomes the next digit in our result. 
Result so far: 99568.548989
The remainder is 73 after subtracting 5787 from 5860.
Since there are no more digits in the dividend, we add a zero to the remainder making it 730, and continue the process.

Moving on to step 15:
643 can be fit into 730 1 times, resulting in a remainder of 87.
The number 1 becomes the next digit in our result. 
Result so far: 99568.5489891
Deduct 643 from 730 and we're left with 87.
Since there are no more digits in the dividend, we add a zero to the remainder making it 870, and continue the process.

Advancing to step 16:
When dividing 870 by 643, we get 1 with a remainder of 227.
The number 1 becomes the next digit in our result. 
Result so far: 99568.54898911
Deduct 643 from 870 and we're left with 227.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2270, and continue the process.

The final outcome is 99568.54898911, with a leftover of 2.27e-07.