We look at the division of 963957 by 71 
The aim is to understand the frequency of 71 in 963957.

Moving on to step 1:
The number 71 fits into 9 0 times, leaving a remainder of 9.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 9 to get 9.
Bring next digit (6) of the dividend behind the 9 and repeat the process: 96 / 71

Step 2:
When dividing 96 by 71, we get 1 with a remainder of 25.
Write down 1 as next digit of the result. 
Result so far: 1.0
Deduct 71 from 96 and we're left with 25.
Bring next digit (3) of the dividend behind the 25 and repeat the process: 253 / 71

Going ahead to step 3:
When dividing 253 by 71, we get 3 with a remainder of 40.
Use 3 as the next digit of our solution. 
Result so far: 13.0
If we take 213 away from 253, we end up with 40.
Append the next digit (9) from the dividend to 40 and continue with: 409 / 71

On to step 4:
71 goes into 409 5 times with a remainder of 54.
Put 5 as the next digit of the answer. 
Result so far: 135.0
Subtract 355 from 409 to get 54.
Append the next digit (5) from the dividend to 54 and continue with: 545 / 71

Advancing to step 5:
If we divide 545 by 71, we get 7 and a remainder of 48.
Put 7 as the next digit of the answer. 
Result so far: 1357.0
If we subtract 497 from 545, we get 48.
Include the next digit (7) from the dividend after 48, then repeat: 487 / 71

On to step 6:
487 divided by 71 is 6 with a remainder of 61.
Write down 6 as next digit of the result. 
Result so far: 13576.0
Deduct 426 from 487 and we're left with 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Advancing to step 7:
610 divided by 71 is 8 with a remainder of 42.
The number 8 becomes the next digit in our result. 
Result so far: 13576.8
Subtract 568 from 610 to get 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Advancing to step 8:
When dividing 420 by 71, we get 5 with a remainder of 65.
Use 5 as the next digit of our solution. 
Result so far: 13576.85
The remainder is 65 after subtracting 355 from 420.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

Step 9:
650 divided by 71 is 9 with a remainder of 11.
The number 9 becomes the next digit in our result. 
Result so far: 13576.859
Deduct 639 from 650 and we're left with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Moving on to step 10:
71 goes into 110 1 times with a remainder of 39.
Put 1 as the next digit of the answer. 
Result so far: 13576.8591
If we take 71 away from 110, we end up with 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

On to step 11:
When dividing 390 by 71, we get 5 with a remainder of 35.
Write down 5 as next digit of the result. 
Result so far: 13576.85915
Subtract 355 from 390 to get 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Step 12:
The number 71 fits into 350 4 times, leaving a remainder of 66.
Use 4 as the next digit of our solution. 
Result so far: 13576.859154
Subtract 284 from 350 to get 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Let's proceed to step 13:
When dividing 660 by 71, we get 9 with a remainder of 21.
The number 9 becomes the next digit in our result. 
Result so far: 13576.8591549
Subtract 639 from 660 to get 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Advancing to step 14:
When dividing 210 by 71, we get 2 with a remainder of 68.
Write down 2 as next digit of the result. 
Result so far: 13576.85915492
Subtracting 142 from 210 leaves us with 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

The final outcome is 13576.85915492, with a leftover of 6.8e-08.