254331 ÷ 87 
The aim is to understand the frequency of 87 in 254331.

Step 1:
2 divided by 87 is 0 with a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Include the next digit (5) from the dividend after 2, then repeat: 25 / 87

Going ahead to step 2:
87 can be fit into 25 0 times, resulting in a remainder of 25.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 25 to get 25.
Include the next digit (4) from the dividend after 25, then repeat: 254 / 87

Advancing to step 3:
If we divide 254 by 87, we get 2 and a remainder of 80.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
If we take 174 away from 254, we end up with 80.
Fetch the next digit (3) from the dividend, attach it to 80 and continue: 803 / 87

Step 4:
When dividing 803 by 87, we get 9 with a remainder of 20.
Put 9 as the next digit of the answer. 
Result so far: 29.0
The remainder is 20 after subtracting 783 from 803.
Bring next digit (3) of the dividend behind the 20 and repeat the process: 203 / 87

On to step 5:
When dividing 203 by 87, we get 2 with a remainder of 29.
Write down 2 as next digit of the result. 
Result so far: 292.0
Deduct 174 from 203 and we're left with 29.
Bring next digit (1) of the dividend behind the 29 and repeat the process: 291 / 87

On to step 6:
If we divide 291 by 87, we get 3 and a remainder of 30.
Record the quotient 3 as the next digit in the result. 
Result so far: 2923.0
Deduct 261 from 291 and we're left 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.

Step 7:
300 divided by 87 is 3 with a remainder of 39.
The number 3 becomes the next digit in our result. 
Result so far: 2923.3
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.

Step 8:
If we divide 390 by 87, we get 4 and a remainder of 42.
The next digit of our result is 4. 
Result so far: 2923.34
Subtract 348 from 390 to get 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Step 9:
When dividing 420 by 87, we get 4 with a remainder of 72.
Put 4 as the next digit of the answer. 
Result so far: 2923.344
Subtracting 348 from 420 leaves us 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.

Our division results in 2923.344 with a remaining 0.0072.