We look at the division of 248925 by 51 
The aim is to understand the frequency of 51 in 248925.

Going ahead to step 1:
51 can be fit into 2 0 times, resulting in a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Grab the next digit (4) from the dividend, add it to 2, then carry on: 24 / 51

Let's proceed to step 2:
If we divide 24 by 51, we get 0 and a remainder of 24.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 24, we get 24.
Grab the next digit (8) from the dividend, add it to 24, then carry on: 248 / 51

Advancing to step 3:
51 goes into 248 4 times with a remainder of 44.
The next digit of our result is 4. 
Result so far: 4.0
Deduct 204 from 248 and we're left with 44.
Take the next digit (9) from the dividend and append it to 44, then repeat: 449 / 51

Step 4:
The number 51 fits into 449 8 times, leaving a remainder of 41.
The number 8 becomes the next digit in our result. 
Result so far: 48.0
Subtract 408 from 449 to get 41.
Fetch the next digit (2) from the dividend, attach it to 41 and continue: 412 / 51

Step 5:
When dividing 412 by 51, we get 8 with a remainder of 4.
Record the quotient 8 as the next digit in the result. 
Result so far: 488.0
Subtracting 408 from 412 leaves us with 4.
Append the next digit (5) from the dividend to 4 and continue with: 45 / 51

Step 6:
51 can be fit into 45 0 times, resulting in a remainder of 45.
The number 0 becomes the next digit in our result. 
Result so far: 4880.0
If we take 0 away from 45, we end up with 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Moving on to step 7:
When dividing 450 by 51, we get 8 with a remainder of 42.
Write down 8 as next digit of the result. 
Result so far: 4880.8
Subtract 408 from 450 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.

Advancing to step 8:
420 divided by 51 is 8 with a remainder of 12.
Use 8 as the next digit of our solution. 
Result so far: 4880.88
The remainder is 12 after subtracting 408 from 420.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

After the division, we end up with 4880.88 and a remainder of 0.012.