We look at the division of 90037713 by 86 
The aim is to understand the frequency of 86 in 90037713.

On to step 1:
If we divide 9 by 86, we get 0 and a remainder of 9.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 9 and we're left with 9.
Bring next digit (0) of the dividend behind the 9 and repeat the process: 90 / 86

Advancing to step 2:
86 goes into 90 1 times with a remainder of 4.
The next digit of our result is 1. 
Result so far: 1.0
Deduct 86 from 90 and we're left with 4.
Fetch the next digit (0) from the dividend, attach it to 4 and continue: 40 / 86

Step 3:
86 goes into 40 0 times with a remainder of 40.
Write down 0 as next digit of the result. 
Result so far: 10.0
Deduct 0 from 40 and we're left with 40.
Include the next digit (3) from the dividend after 40, then repeat: 403 / 86

Step 4:
86 goes into 403 4 times with a remainder of 59.
The next digit of our result is 4. 
Result so far: 104.0
Subtracting 344 from 403 leaves us with 59.
Bring next digit (7) of the dividend behind the 59 and repeat the process: 597 / 86

Going ahead to step 5:
When dividing 597 by 86, we get 6 with a remainder of 81.
Use 6 as the next digit of our solution. 
Result so far: 1046.0
Deduct 516 from 597 and we're left with 81.
Include the next digit (7) from the dividend after 81, then repeat: 817 / 86

Going ahead to step 6:
The number 86 fits into 817 9 times, leaving a remainder of 43.
The next digit of our result is 9. 
Result so far: 10469.0
Subtract 774 from 817 to get 43.
Grab the next digit (1) from the dividend, add it to 43, then carry on: 431 / 86

Advancing to step 7:
86 can be fit into 431 5 times, resulting in a remainder of 1.
Use 5 as the next digit of our solution. 
Result so far: 104695.0
Subtracting 430 from 431 leaves us with 1.
Include the next digit (3) from the dividend after 1, then repeat: 13 / 86

Let's proceed to step 8:
86 goes into 13 0 times with a remainder of 13.
Put 0 as the next digit of the answer. 
Result so far: 1046950.0
If we take 0 away from 13, we end up with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Going ahead to step 9:
86 goes into 130 1 times with a remainder of 44.
Use 1 as the next digit of our solution. 
Result so far: 1046950.1
The remainder is 44 after subtracting 86 from 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Going ahead to step 10:
86 can be fit into 440 5 times, resulting in a remainder of 10.
The next digit of our result is 5. 
Result so far: 1046950.15
If we subtract 430 from 440, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 11:
If we divide 100 by 86, we get 1 and a remainder of 14.
Use 1 as the next digit of our solution. 
Result so far: 1046950.151
Subtracting 86 from 100 leaves us with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Advancing to step 12:
86 goes into 140 1 times with a remainder of 54.
Put 1 as the next digit of the answer. 
Result so far: 1046950.1511
If we take 86 away from 140, we end up 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.

The quotient of the division is 1046950.1511, and the remainder is 0.00054.