We look at the division of 89400184 by 86 
The aim is to understand the frequency of 86 in 89400184.

On to step 1:
When dividing 8 by 86, we get 0 with a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Take the next digit (9) from the dividend and append it to 8, then repeat: 89 / 86

On to step 2:
The number 86 fits into 89 1 times, leaving a remainder of 3.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtract 86 from 89 to get 3.
Append the next digit (4) from the dividend to 3 and continue with: 34 / 86

On to step 3:
The number 86 fits into 34 0 times, leaving a remainder of 34.
Record the quotient 0 as the next digit in the result. 
Result so far: 10.0
Deduct 0 from 34 and we're left with 34.
Append the next digit (0) from the dividend to 34 and continue with: 340 / 86

On to step 4:
When dividing 340 by 86, we get 3 with a remainder of 82.
The next digit of our result is 3. 
Result so far: 103.0
If we take 258 away from 340, we end up with 82.
Include the next digit (0) from the dividend after 82, then repeat: 820 / 86

Moving on to step 5:
86 goes into 820 9 times with a remainder of 46.
Write down 9 as next digit of the result. 
Result so far: 1039.0
Deduct 774 from 820 and we're left with 46.
Take the next digit (1) from the dividend and append it to 46, then repeat: 461 / 86

On to step 6:
86 goes into 461 5 times with a remainder of 31.
Write down 5 as next digit of the result. 
Result so far: 10395.0
If we subtract 430 from 461, we get 31.
Include the next digit (8) from the dividend after 31, then repeat: 318 / 86

Advancing to step 7:
86 can be fit into 318 3 times, resulting in a remainder of 60.
Use 3 as the next digit of our solution. 
Result so far: 103953.0
Subtracting 258 from 318 leaves us with 60.
Include the next digit (4) from the dividend after 60, then repeat: 604 / 86

Going ahead to step 8:
When dividing 604 by 86, we get 7 with a remainder of 2.
Write down 7 as next digit of the result. 
Result so far: 1039537.0
Subtracting 602 from 604 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Let's proceed to step 9:
86 can be fit into 20 0 times, resulting in a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 1039537.0
If we subtract 0 from 20, we get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Advancing to step 10:
When dividing 200 by 86, we get 2 with a remainder of 28.
Put 2 as the next digit of the answer. 
Result so far: 1039537.02
Subtracting 172 from 200 leaves us with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Moving on to step 11:
86 can be fit into 280 3 times, resulting in a remainder of 22.
The number 3 becomes the next digit in our result. 
Result so far: 1039537.023
If we subtract 258 from 280, we get 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Step 12:
86 goes into 220 2 times with a remainder of 48.
The number 2 becomes the next digit in our result. 
Result so far: 1039537.0232
The remainder is 48 after subtracting 172 from 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Moving on to step 13:
The number 86 fits into 480 5 times, leaving a remainder of 50.
Write down 5 as next digit of the result. 
Result so far: 1039537.02325
Deduct 430 from 480 and we're left with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Let's proceed to step 14:
86 can be fit into 500 5 times, resulting in a remainder of 70.
The next digit of our result is 5. 
Result so far: 1039537.023255
Deduct 430 from 500 and we're left with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

The final result is 1039537.023255 with a remainder of 7e-06.