We look at the division of 78159560 by 931 
The aim is to understand the frequency of 931 in 78159560.

Going ahead to step 1:
If we divide 7 by 931, we get 0 and a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Append the next digit (8) from the dividend to 7 and continue with: 78 / 931

Going ahead to step 2:
The number 931 fits into 78 0 times, leaving a remainder of 78.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 78 to get 78.
Fetch the next digit (1) from the dividend, attach it to 78 and continue: 781 / 931

Going ahead to step 3:
931 goes into 781 0 times with a remainder of 781.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 781 after subtracting 0 from 781.
Take the next digit (5) from the dividend and append it to 781, then repeat: 7815 / 931

On to step 4:
The number 931 fits into 7815 8 times, leaving a remainder of 367.
Record the quotient 8 as the next digit in the result. 
Result so far: 8.0
If we subtract 7448 from 7815, we get 367.
Take the next digit (9) from the dividend and append it to 367, then repeat: 3679 / 931

Advancing to step 5:
3679 divided by 931 is 3 with a remainder of 886.
Record the quotient 3 as the next digit in the result. 
Result so far: 83.0
If we take 2793 away from 3679, we end up with 886.
Bring next digit (5) of the dividend behind the 886 and repeat the process: 8865 / 931

Step 6:
8865 divided by 931 is 9 with a remainder of 486.
The number 9 becomes the next digit in our result. 
Result so far: 839.0
If we subtract 8379 from 8865, we get 486.
Bring next digit (6) of the dividend behind the 486 and repeat the process: 4866 / 931

Moving on to step 7:
931 goes into 4866 5 times with a remainder of 211.
The number 5 becomes the next digit in our result. 
Result so far: 8395.0
Deduct 4655 from 4866 and we're left with 211.
Grab the next digit (0) from the dividend, add it to 211, then carry on: 2110 / 931

Let's proceed to step 8:
If we divide 2110 by 931, we get 2 and a remainder of 248.
Use 2 as the next digit of our solution. 
Result so far: 83952.0
Subtracting 1862 from 2110 leaves us with 248.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2480, and continue the process.

Step 9:
When dividing 2480 by 931, we get 2 with a remainder of 618.
Write down 2 as next digit of the result. 
Result so far: 83952.2
Subtracting 1862 from 2480 leaves us with 618.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6180, and continue the process.

Going ahead to step 10:
931 can be fit into 6180 6 times, resulting in a remainder of 594.
The number 6 becomes the next digit in our result. 
Result so far: 83952.26
The remainder is 594 after subtracting 5586 from 6180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5940, and continue the process.

Moving on to step 11:
If we divide 5940 by 931, we get 6 and a remainder of 354.
Use 6 as the next digit of our solution. 
Result so far: 83952.266
Subtract 5586 from 5940 to get 354.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3540, and continue the process.

After the division, we end up with 83952.266 and a remainder of 0.0354.