We look at the division of 81970930 by 931 
The aim is to understand the frequency of 931 in 81970930.

On to step 1:
If we divide 8 by 931, we get 0 and a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Fetch the next digit (1) from the dividend, attach it to 8 and continue: 81 / 931

On to step 2:
81 divided by 931 is 0 with a remainder of 81.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 81 leaves us with 81.
Include the next digit (9) from the dividend after 81, then repeat: 819 / 931

Moving on to step 3:
931 can be fit into 819 0 times, resulting in a remainder of 819.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 819, we get 819.
Include the next digit (7) from the dividend after 819, then repeat: 8197 / 931

Moving on to step 4:
8197 divided by 931 is 8 with a remainder of 749.
Put 8 as the next digit of the answer. 
Result so far: 8.0
Deduct 7448 from 8197 and we're left with 749.
Append the next digit (0) from the dividend to 749 and continue with: 7490 / 931

Moving on to step 5:
931 goes into 7490 8 times with a remainder of 42.
Use 8 as the next digit of our solution. 
Result so far: 88.0
If we subtract 7448 from 7490, we get 42.
Fetch the next digit (9) from the dividend, attach it to 42 and continue: 429 / 931

Let's proceed to step 6:
The number 931 fits into 429 0 times, leaving a remainder of 429.
The number 0 becomes the next digit in our result. 
Result so far: 880.0
The remainder is 429 after subtracting 0 from 429.
Grab the next digit (3) from the dividend, add it to 429, then carry on: 4293 / 931

On to step 7:
931 can be fit into 4293 4 times, resulting in a remainder of 569.
The next digit of our result is 4. 
Result so far: 8804.0
If we take 3724 away from 4293, we end up with 569.
Fetch the next digit (0) from the dividend, attach it to 569 and continue: 5690 / 931

Let's proceed to step 8:
When dividing 5690 by 931, we get 6 with a remainder of 104.
Write down 6 as next digit of the result. 
Result so far: 88046.0
If we take 5586 away from 5690, we end up with 104.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1040, and continue the process.

Moving on to step 9:
The number 931 fits into 1040 1 times, leaving a remainder of 109.
Use 1 as the next digit of our solution. 
Result so far: 88046.1
If we take 931 away from 1040, we end up with 109.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1090, and continue the process.

Let's proceed to step 10:
If we divide 1090 by 931, we get 1 and a remainder of 159.
The next digit of our result is 1. 
Result so far: 88046.11
The remainder is 159 after subtracting 931 from 1090.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1590, and continue the process.

The final result is 88046.11 with a remainder of 0.159.