We're dividing 258875 by 51 
The aim is to understand the frequency of 51 in 258875.

Advancing to step 1:
51 can be fit into 2 0 times, resulting in a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Grab the next digit (5) from the dividend, add it to 2, then carry on: 25 / 51

On to step 2:
51 can be fit into 25 0 times, resulting in a remainder of 25.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 25 to get 25.
Include the next digit (8) from the dividend after 25, then repeat: 258 / 51

Let's proceed to step 3:
When dividing 258 by 51, we get 5 with a remainder of 3.
The number 5 becomes the next digit in our result. 
Result so far: 5.0
If we take 255 away from 258, we end up with 3.
Append the next digit (8) from the dividend to 3 and continue with: 38 / 51

Step 4:
38 divided by 51 is 0 with a remainder of 38.
The next digit of our result is 0. 
Result so far: 50.0
The remainder is 38 after subtracting 0 from 38.
Include the next digit (7) from the dividend after 38, then repeat: 387 / 51

Moving on to step 5:
387 divided by 51 is 7 with a remainder of 30.
Write down 7 as next digit of the result. 
Result so far: 507.0
Deduct 357 from 387 and we're left with 30.
Bring next digit (5) of the dividend behind the 30 and repeat the process: 305 / 51

Advancing to step 6:
51 can be fit into 305 5 times, resulting in a remainder of 50.
The next digit of our result is 5. 
Result so far: 5075.0
If we subtract 255 from 305, we get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Moving on to step 7:
When dividing 500 by 51, we get 9 with a remainder of 41.
Use 9 as the next digit of our solution. 
Result so far: 5075.9
If we take 459 away from 500, we end up with 41.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

Going ahead to step 8:
The number 51 fits into 410 8 times, leaving a remainder of 2.
Record the quotient 8 as the next digit in the result. 
Result so far: 5075.98
The remainder is 2 after subtracting 408 from 410.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

On to step 9:
If we divide 20 by 51, we get 0 and a remainder of 20.
Put 0 as the next digit of the answer. 
Result so far: 5075.98
If we take 0 away from 20, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Moving on to step 10:
The number 51 fits into 200 3 times, leaving a remainder of 47.
The next digit of our result is 3. 
Result so far: 5075.9803
Subtracting 153 from 200 leaves us with 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

Let's proceed to step 11:
When dividing 470 by 51, we get 9 with a remainder of 11.
Put 9 as the next digit of the answer. 
Result so far: 5075.98039
The remainder is 11 after subtracting 459 from 470.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

On to step 12:
If we divide 110 by 51, we get 2 and a remainder of 8.
Write down 2 as next digit of the result. 
Result so far: 5075.980392
If we take 102 away from 110, we end up with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Let's proceed to step 13:
51 goes into 80 1 times with a remainder of 29.
Put 1 as the next digit of the answer. 
Result so far: 5075.9803921
The remainder is 29 after subtracting 51 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Step 14:
290 divided by 51 is 5 with a remainder of 35.
Write down 5 as next digit of the result. 
Result so far: 5075.98039215
Subtract 255 from 290 to get 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

In conclusion, the division gives 5075.98039215 with a balance of 3.5e-08.