We're dividing 938151 by 87 
The aim is to understand the frequency of 87 in 938151.

On to step 1:
If we divide 9 by 87, we get 0 and a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 9, we end up with 9.
Append the next digit (3) from the dividend to 9 and continue with: 93 / 87

Going ahead to step 2:
When dividing 93 by 87, we get 1 with a remainder of 6.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we subtract 87 from 93, we get 6.
Include the next digit (8) from the dividend after 6, then repeat: 68 / 87

Step 3:
68 divided by 87 is 0 with a remainder of 68.
Use 0 as the next digit of our solution. 
Result so far: 10.0
The remainder is 68 after subtracting 0 from 68.
Take the next digit (1) from the dividend and append it to 68, then repeat: 681 / 87

Going ahead to step 4:
When dividing 681 by 87, we get 7 with a remainder of 72.
Record the quotient 7 as the next digit in the result. 
Result so far: 107.0
Subtracting 609 from 681 leaves us with 72.
Bring next digit (5) of the dividend behind the 72 and repeat the process: 725 / 87

Going ahead to step 5:
87 goes into 725 8 times with a remainder of 29.
The next digit of our result is 8. 
Result so far: 1078.0
Deduct 696 from 725 and we're left with 29.
Grab the next digit (1) from the dividend, add it to 29, then carry on: 291 / 87

Advancing to step 6:
The number 87 fits into 291 3 times, leaving a remainder of 30.
Put 3 as the next digit of the answer. 
Result so far: 10783.0
Subtract 261 from 291 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.

Let's proceed to step 7:
The number 87 fits into 300 3 times, leaving a remainder of 39.
The next digit of our result is 3. 
Result so far: 10783.3
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.

Going ahead to step 8:
390 divided by 87 is 4 with a remainder of 42.
The next digit of our result is 4. 
Result so far: 10783.34
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.

Let's proceed to step 9:
420 divided by 87 is 4 with a remainder of 72.
The next digit of our result is 4. 
Result so far: 10783.344
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 10783.344 with a remaining 0.0072.