We look at the division of 907860 by 71 
The aim is to understand the frequency of 71 in 907860.

On to step 1:
71 goes into 9 0 times with a remainder of 9.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Take the next digit (0) from the dividend and append it to 9, then repeat: 90 / 71

Going ahead to step 2:
If we divide 90 by 71, we get 1 and a remainder of 19.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we subtract 71 from 90, we get 19.
Fetch the next digit (7) from the dividend, attach it to 19 and continue: 197 / 71

Step 3:
If we divide 197 by 71, we get 2 and a remainder of 55.
Put 2 as the next digit of the answer. 
Result so far: 12.0
Subtracting 142 from 197 leaves us with 55.
Append the next digit (8) from the dividend to 55 and continue with: 558 / 71

Step 4:
When dividing 558 by 71, we get 7 with a remainder of 61.
Put 7 as the next digit of the answer. 
Result so far: 127.0
Deduct 497 from 558 and we're left with 61.
Bring next digit (6) of the dividend behind the 61 and repeat the process: 616 / 71

Moving on to step 5:
71 goes into 616 8 times with a remainder of 48.
The number 8 becomes the next digit in our result. 
Result so far: 1278.0
Subtract 568 from 616 to get 48.
Fetch the next digit (0) from the dividend, attach it to 48 and continue: 480 / 71

Let's proceed to step 6:
71 can be fit into 480 6 times, resulting in a remainder of 54.
The next digit of our result is 6. 
Result so far: 12786.0
Deduct 426 from 480 and we're left with 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Advancing to step 7:
If we divide 540 by 71, we get 7 and a remainder of 43.
Use 7 as the next digit of our solution. 
Result so far: 12786.7
Deduct 497 from 540 and we're left with 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Step 8:
When dividing 430 by 71, we get 6 with a remainder of 4.
Write down 6 as next digit of the result. 
Result so far: 12786.76
Subtract 426 from 430 to get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Let's proceed to step 9:
40 divided by 71 is 0 with a remainder of 40.
The number 0 becomes the next digit in our result. 
Result so far: 12786.76
If we subtract 0 from 40, we get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Let's proceed to step 10:
When dividing 400 by 71, we get 5 with a remainder of 45.
Record the quotient 5 as the next digit in the result. 
Result so far: 12786.7605
Subtract 355 from 400 to get 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Let's proceed to step 11:
When dividing 450 by 71, we get 6 with a remainder of 24.
The number 6 becomes the next digit in our result. 
Result so far: 12786.76056
Deduct 426 from 450 and we're left with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Let's proceed to step 12:
240 divided by 71 is 3 with a remainder of 27.
Put 3 as the next digit of the answer. 
Result so far: 12786.760563
Subtracting 213 from 240 leaves us with 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Going ahead to step 13:
71 can be fit into 270 3 times, resulting in a remainder of 57.
Record the quotient 3 as the next digit in the result. 
Result so far: 12786.7605633
Subtracting 213 from 270 leaves us with 57.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

The final result is 12786.7605633 with a remainder of 5.7e-07.