We're dividing 974870 by 86 
The aim is to understand the frequency of 86 in 974870.

Advancing to step 1:
If we divide 9 by 86, we get 0 and 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.
Grab the next digit (7) from the dividend, add it to 9, then carry on: 97 / 86

Step 2:
97 divided by 86 is 1 with a remainder of 11.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we take 86 away from 97, we end up with 11.
Bring next digit (4) of the dividend behind the 11 and repeat the process: 114 / 86

On to step 3:
86 can be fit into 114 1 times, resulting in a remainder of 28.
Record the quotient 1 as the next digit in the result. 
Result so far: 11.0
Subtract 86 from 114 to get 28.
Include the next digit (8) from the dividend after 28, then repeat: 288 / 86

Going ahead to step 4:
If we divide 288 by 86, we get 3 and a remainder of 30.
Put 3 as the next digit of the answer. 
Result so far: 113.0
Subtract 258 from 288 to get 30.
Grab the next digit (7) from the dividend, add it to 30, then carry on: 307 / 86

Step 5:
If we divide 307 by 86, we get 3 and a remainder of 49.
Record the quotient 3 as the next digit in the result. 
Result so far: 1133.0
Deduct 258 from 307 and we're left with 49.
Append the next digit (0) from the dividend to 49 and continue with: 490 / 86

Step 6:
The number 86 fits into 490 5 times, leaving a remainder of 60.
Use 5 as the next digit of our solution. 
Result so far: 11335.0
The remainder is 60 after subtracting 430 from 490.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Going ahead to step 7:
86 can be fit into 600 6 times, resulting in a remainder of 84.
The next digit of our result is 6. 
Result so far: 11335.6
Deduct 516 from 600 and we're left with 84.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

Going ahead to step 8:
The number 86 fits into 840 9 times, leaving a remainder of 66.
Put 9 as the next digit of the answer. 
Result so far: 11335.69
Deduct 774 from 840 and we're left with 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Advancing to step 9:
660 divided by 86 is 7 with a remainder of 58.
The number 7 becomes the next digit in our result. 
Result so far: 11335.697
Deduct 602 from 660 and we're left with 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Let's proceed to step 10:
86 goes into 580 6 times with a remainder of 64.
Record the quotient 6 as the next digit in the result. 
Result so far: 11335.6976
The remainder is 64 after subtracting 516 from 580.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Going ahead to step 11:
86 goes into 640 7 times with a remainder of 38.
Put 7 as the next digit of the answer. 
Result so far: 11335.69767
Deduct 602 from 640 and we're left with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Step 12:
86 can be fit into 380 4 times, resulting in a remainder of 36.
The next digit of our result is 4. 
Result so far: 11335.697674
If we subtract 344 from 380, we get 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Step 13:
If we divide 360 by 86, we get 4 and a remainder of 16.
The number 4 becomes the next digit in our result. 
Result so far: 11335.6976744
If we take 344 away from 360, we end up with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Our division results in 11335.6976744 with a remaining 1.6e-07.