125875 divided by 86 
The aim is to understand the frequency of 86 in 125875.

On to step 1:
The number 86 fits into 1 0 times, leaving a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Grab the next digit (2) from the dividend, add it to 1, then carry on: 12 / 86

Moving on to step 2:
When dividing 12 by 86, we get 0 with a remainder of 12.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 12, we end up with 12.
Take the next digit (5) from the dividend and append it to 12, then repeat: 125 / 86

Going ahead to step 3:
86 goes into 125 1 times with a remainder of 39.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtracting 86 from 125 leaves us with 39.
Take the next digit (8) from the dividend and append it to 39, then repeat: 398 / 86

Going ahead to step 4:
If we divide 398 by 86, we get 4 and a remainder of 54.
The next digit of our result is 4. 
Result so far: 14.0
Deduct 344 from 398 and we're left with 54.
Grab the next digit (7) from the dividend, add it to 54, then carry on: 547 / 86

Advancing to step 5:
547 divided by 86 is 6 with a remainder of 31.
Record the quotient 6 as the next digit in the result. 
Result so far: 146.0
Deduct 516 from 547 and we're left with 31.
Take the next digit (5) from the dividend and append it to 31, then repeat: 315 / 86

Moving on to step 6:
If we divide 315 by 86, we get 3 and a remainder of 57.
Put 3 as the next digit of the answer. 
Result so far: 1463.0
Deduct 258 from 315 and we're left with 57.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

On to step 7:
86 can be fit into 570 6 times, resulting in a remainder of 54.
Record the quotient 6 as the next digit in the result. 
Result so far: 1463.6
Subtracting 516 from 570 leaves us with 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Step 8:
If we divide 540 by 86, we get 6 and a remainder of 24.
The number 6 becomes the next digit in our result. 
Result so far: 1463.66
The remainder is 24 after subtracting 516 from 540.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Our division results in 1463.66 with a remaining 0.024.