We look at the division of 158100 by 87 
The aim is to understand the frequency of 87 in 158100.

On to step 1:
If we divide 1 by 87, we get 0 and a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Fetch the next digit (5) from the dividend, attach it to 1 and continue: 15 / 87

Moving on to step 2:
87 can be fit into 15 0 times, resulting in a remainder of 15.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 15, we get 15.
Append the next digit (8) from the dividend to 15 and continue with: 158 / 87

Step 3:
The number 87 fits into 158 1 times, leaving a remainder of 71.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtract 87 from 158 to get 71.
Take the next digit (1) from the dividend and append it to 71, then repeat: 711 / 87

Going ahead to step 4:
711 divided by 87 is 8 with a remainder of 15.
The next digit of our result is 8. 
Result so far: 18.0
Subtract 696 from 711 to get 15.
Bring next digit (0) of the dividend behind the 15 and repeat the process: 150 / 87

Step 5:
If we divide 150 by 87, we get 1 and a remainder of 63.
The number 1 becomes the next digit in our result. 
Result so far: 181.0
Subtracting 87 from 150 leaves us with 63.
Grab the next digit (0) from the dividend, add it to 63, then carry on: 630 / 87

Step 6:
630 divided by 87 is 7 with a remainder of 21.
Record the quotient 7 as the next digit in the result. 
Result so far: 1817.0
Subtract 609 from 630 to get 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Step 7:
If we divide 210 by 87, we get 2 and a remainder of 36.
The next digit of our result is 2. 
Result so far: 1817.2
If we subtract 174 from 210, 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 8:
360 divided by 87 is 4 with a remainder of 12.
Write down 4 as next digit of the result. 
Result so far: 1817.24
Subtracting 348 from 360 leaves us with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

On to step 9:
87 can be fit into 120 1 times, resulting in a remainder of 33.
The number 1 becomes the next digit in our result. 
Result so far: 1817.241
Deduct 87 from 120 and we're left with 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Advancing to step 10:
When dividing 330 by 87, we get 3 with a remainder of 69.
Write down 3 as next digit of the result. 
Result so far: 1817.2413
The remainder is 69 after subtracting 261 from 330.
Since there are no more digits in the dividend, we add a zero to the remainder making it 690, and continue the process.

Moving on to step 11:
The number 87 fits into 690 7 times, leaving a remainder of 81.
Write down 7 as next digit of the result. 
Result so far: 1817.24137
If we take 609 away from 690, we end up with 81.
Since there are no more digits in the dividend, we add a zero to the remainder making it 810, and continue the process.

On to step 12:
87 can be fit into 810 9 times, resulting in a remainder of 27.
The number 9 becomes the next digit in our result. 
Result so far: 1817.241379
Deduct 783 from 810 and we're left with 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Step 13:
87 can be fit into 270 3 times, resulting in a remainder of 9.
The number 3 becomes the next digit in our result. 
Result so far: 1817.2413793
Subtract 261 from 270 to get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Let's proceed to step 14:
87 goes into 90 1 times with a remainder of 3.
Put 1 as the next digit of the answer. 
Result so far: 1817.24137931
If we subtract 87 from 90, we get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

In conclusion, the division gives 1817.24137931 with a balance of 3e-09.