We're dividing 152131 by 28 
The aim is to understand the frequency of 28 in 152131.

Going ahead to step 1:
If we divide 1 by 28, we get 0 and a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Grab the next digit (5) from the dividend, add it to 1, then carry on: 15 / 28

Step 2:
The number 28 fits into 15 0 times, leaving a remainder of 15.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 15 leaves us with 15.
Grab the next digit (2) from the dividend, add it to 15, then carry on: 152 / 28

On to step 3:
The number 28 fits into 152 5 times, leaving a remainder of 12.
The number 5 becomes the next digit in our result. 
Result so far: 5.0
The remainder is 12 after subtracting 140 from 152.
Grab the next digit (1) from the dividend, add it to 12, then carry on: 121 / 28

On to step 4:
121 divided by 28 is 4 with a remainder of 9.
Record the quotient 4 as the next digit in the result. 
Result so far: 54.0
Subtracting 112 from 121 leaves us with 9.
Fetch the next digit (3) from the dividend, attach it to 9 and continue: 93 / 28

Step 5:
28 goes into 93 3 times with a remainder of 9.
The number 3 becomes the next digit in our result. 
Result so far: 543.0
The remainder is 9 after subtracting 84 from 93.
Bring next digit (1) of the dividend behind the 9 and repeat the process: 91 / 28

Going ahead to step 6:
The number 28 fits into 91 3 times, leaving a remainder of 7.
Record the quotient 3 as the next digit in the result. 
Result so far: 5433.0
If we take 84 away from 91, we end up with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Moving on to step 7:
The number 28 fits into 70 2 times, leaving a remainder of 14.
Put 2 as the next digit of the answer. 
Result so far: 5433.2
Subtract 56 from 70 to get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

On to step 8:
The number 28 fits into 140 5 times, leaving a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 5433.25
Subtract 140 from 140 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 9:
The number 28 fits into 0 0 times, leaving a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 5433.25
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 10:
The number 28 fits into 0 0 times, leaving a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 5433.25
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

After the division, we end up with 5433.25 and a remainder of 0.0.