We look at the division of 231924 by 87 
The aim is to understand the frequency of 87 in 231924.

Let's proceed to step 1:
The number 87 fits into 2 0 times, leaving a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Append the next digit (3) from the dividend to 2 and continue with: 23 / 87

Let's proceed to step 2:
The number 87 fits into 23 0 times, leaving a remainder of 23.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 23 leaves us with 23.
Fetch the next digit (1) from the dividend, attach it to 23 and continue: 231 / 87

On to step 3:
When dividing 231 by 87, we get 2 with a remainder of 57.
The next digit of our result is 2. 
Result so far: 2.0
If we subtract 174 from 231, we get 57.
Include the next digit (9) from the dividend after 57, then repeat: 579 / 87

On to step 4:
579 divided by 87 is 6 with a remainder of 57.
The next digit of our result is 6. 
Result so far: 26.0
If we subtract 522 from 579, we get 57.
Bring next digit (2) of the dividend behind the 57 and repeat the process: 572 / 87

Advancing to step 5:
87 can be fit into 572 6 times, resulting in a remainder of 50.
Put 6 as the next digit of the answer. 
Result so far: 266.0
If we subtract 522 from 572, we get 50.
Append the next digit (4) from the dividend to 50 and continue with: 504 / 87

On to step 6:
When dividing 504 by 87, we get 5 with a remainder of 69.
The number 5 becomes the next digit in our result. 
Result so far: 2665.0
If we subtract 435 from 504, we get 69.
Since there are no more digits in the dividend, we add a zero to the remainder making it 690, and continue the process.

Step 7:
When dividing 690 by 87, we get 7 with a remainder of 81.
Record the quotient 7 as the next digit in the result. 
Result so far: 2665.7
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.

Moving on to step 8:
The number 87 fits into 810 9 times, leaving a remainder of 27.
Put 9 as the next digit of the answer. 
Result so far: 2665.79
If we subtract 783 from 810, we get 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Going ahead to step 9:
When dividing 270 by 87, we get 3 with a remainder of 9.
Record the quotient 3 as the next digit in the result. 
Result so far: 2665.793
The remainder is 9 after subtracting 261 from 270.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Step 10:
The number 87 fits into 90 1 times, leaving a remainder of 3.
The next digit of our result is 1. 
Result so far: 2665.7931
The remainder is 3 after subtracting 87 from 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

On to step 11:
The number 87 fits into 30 0 times, leaving a remainder of 30.
Put 0 as the next digit of the answer. 
Result so far: 2665.7931
Subtracting 0 from 30 leaves us with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Let's proceed to step 12:
300 divided by 87 is 3 with a remainder of 39.
The next digit of our result is 3. 
Result so far: 2665.793103
Subtract 261 from 300 to get 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

On to step 13:
87 goes into 390 4 times with a remainder of 42.
Record the quotient 4 as the next digit in the result. 
Result so far: 2665.7931034
If we take 348 away from 390, we end up with 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

On to step 14:
If we divide 420 by 87, we get 4 and a remainder of 72.
The number 4 becomes the next digit in our result. 
Result so far: 2665.79310344
Deduct 348 from 420 and we're left with 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

The final outcome is 2665.79310344, with a leftover of 7.2e-08.