We look at the division of 422919 by 87 
The aim is to understand the frequency of 87 in 422919.

On to step 1:
If we divide 4 by 87, we get 0 and a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Take the next digit (2) from the dividend and append it to 4, then repeat: 42 / 87

Advancing to step 2:
When dividing 42 by 87, we get 0 with a remainder of 42.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 42 and we're left with 42.
Take the next digit (2) from the dividend and append it to 42, then repeat: 422 / 87

On to step 3:
422 divided by 87 is 4 with a remainder of 74.
The next digit of our result is 4. 
Result so far: 4.0
Subtract 348 from 422 to get 74.
Take the next digit (9) from the dividend and append it to 74, then repeat: 749 / 87

Going ahead to step 4:
87 can be fit into 749 8 times, resulting in a remainder of 53.
Put 8 as the next digit of the answer. 
Result so far: 48.0
If we subtract 696 from 749, we get 53.
Append the next digit (1) from the dividend to 53 and continue with: 531 / 87

Let's proceed to step 5:
The number 87 fits into 531 6 times, leaving a remainder of 9.
The number 6 becomes the next digit in our result. 
Result so far: 486.0
Deduct 522 from 531 and we're left with 9.
Grab the next digit (9) from the dividend, add it to 9, then carry on: 99 / 87

On to step 6:
The number 87 fits into 99 1 times, leaving a remainder of 12.
Put 1 as the next digit of the answer. 
Result so far: 4861.0
The remainder is 12 after subtracting 87 from 99.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Let's proceed to step 7:
87 goes into 120 1 times with a remainder of 33.
Put 1 as the next digit of the answer. 
Result so far: 4861.1
The remainder is 33 after subtracting 87 from 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Moving on to step 8:
If we divide 330 by 87, we get 3 and a remainder of 69.
Record the quotient 3 as the next digit in the result. 
Result so far: 4861.13
If we take 261 away from 330, we end up with 69.
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 9:
The number 87 fits into 690 7 times, leaving a remainder of 81.
Put 7 as the next digit of the answer. 
Result so far: 4861.137
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.

Let's proceed to step 10:
810 divided by 87 is 9 with a remainder of 27.
Use 9 as the next digit of our solution. 
Result so far: 4861.1379
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.

Moving on to step 11:
If we divide 270 by 87, we get 3 and a remainder of 9.
Write down 3 as next digit of the result. 
Result so far: 4861.13793
Deduct 261 from 270 and we're left with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Step 12:
If we divide 90 by 87, we get 1 and a remainder of 3.
Record the quotient 1 as the next digit in the result. 
Result so far: 4861.137931
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.

Advancing to step 13:
87 can be fit into 30 0 times, resulting in a remainder of 30.
Write down 0 as next digit of the result. 
Result so far: 4861.137931
Subtract 0 from 30 to get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Advancing to step 14:
87 goes into 300 3 times with a remainder of 39.
Put 3 as the next digit of the answer. 
Result so far: 4861.13793103
If we subtract 261 from 300, we 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.

The final outcome is 4861.13793103, with a leftover of 3.9e-08.