We're dividing 8601390 by 979 
The aim is to understand the frequency of 979 in 8601390.

Step 1:
979 goes into 8 0 times with 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.
Grab the next digit (6) from the dividend, add it to 8, then carry on: 86 / 979

Step 2:
The number 979 fits into 86 0 times, leaving a remainder of 86.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 86 leaves us with 86.
Include the next digit (0) from the dividend after 86, then repeat: 860 / 979

Going ahead to step 3:
The number 979 fits into 860 0 times, leaving a remainder of 860.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 860 leaves us with 860.
Append the next digit (1) from the dividend to 860 and continue with: 8601 / 979

Let's proceed to step 4:
8601 divided by 979 is 8 with a remainder of 769.
Write down 8 as next digit of the result. 
Result so far: 8.0
The remainder is 769 after subtracting 7832 from 8601.
Bring next digit (3) of the dividend behind the 769 and repeat the process: 7693 / 979

Advancing to step 5:
7693 divided by 979 is 7 with a remainder of 840.
The next digit of our result is 7. 
Result so far: 87.0
If we take 6853 away from 7693, we end up with 840.
Grab the next digit (9) from the dividend, add it to 840, then carry on: 8409 / 979

Going ahead to step 6:
The number 979 fits into 8409 8 times, leaving a remainder of 577.
Use 8 as the next digit of our solution. 
Result so far: 878.0
If we take 7832 away from 8409, we end up with 577.
Grab the next digit (0) from the dividend, add it to 577, then carry on: 5770 / 979

On to step 7:
If we divide 5770 by 979, we get 5 and a remainder of 875.
Put 5 as the next digit of the answer. 
Result so far: 8785.0
The remainder is 875 after subtracting 4895 from 5770.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8750, and continue the process.

Advancing to step 8:
The number 979 fits into 8750 8 times, leaving a remainder of 918.
The next digit of our result is 8. 
Result so far: 8785.8
Subtract 7832 from 8750 to get 918.
Since there are no more digits in the dividend, we add a zero to the remainder making it 9180, and continue the process.

Advancing to step 9:
When dividing 9180 by 979, we get 9 with a remainder of 369.
The number 9 becomes the next digit in our result. 
Result so far: 8785.89
If we subtract 8811 from 9180, we get 369.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3690, and continue the process.

On to step 10:
979 can be fit into 3690 3 times, resulting in a remainder of 753.
Put 3 as the next digit of the answer. 
Result so far: 8785.893
If we subtract 2937 from 3690, we get 753.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7530, and continue the process.

Moving on to step 11:
When dividing 7530 by 979, we get 7 with a remainder of 677.
Use 7 as the next digit of our solution. 
Result so far: 8785.8937
The remainder is 677 after subtracting 6853 from 7530.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6770, and continue the process.

On to step 12:
979 goes into 6770 6 times with a remainder of 896.
The next digit of our result is 6. 
Result so far: 8785.89376
Subtract 5874 from 6770 to get 896.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8960, and continue the process.

Let's proceed to step 13:
8960 divided by 979 is 9 with a remainder of 149.
Put 9 as the next digit of the answer. 
Result so far: 8785.893769
Subtracting 8811 from 8960 leaves us with 149.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1490, and continue the process.

Moving on to step 14:
1490 divided by 979 is 1 with a remainder of 511.
Put 1 as the next digit of the answer. 
Result so far: 8785.8937691
If we subtract 979 from 1490, we get 511.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5110, and continue the process.

Step 15:
979 can be fit into 5110 5 times, resulting in a remainder of 215.
The next digit of our result is 5. 
Result so far: 8785.89376915
Subtracting 4895 from 5110 leaves us with 215.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2150, and continue the process.

The final outcome is 8785.89376915, with a leftover of 2.15e-07.