225579 ÷ 51 
The aim is to understand the frequency of 51 in 225579.

Moving on to step 1:
51 can be fit into 2 0 times, resulting in a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Take the next digit (2) from the dividend and append it to 2, then repeat: 22 / 51

Going ahead to step 2:
If we divide 22 by 51, we get 0 and a remainder of 22.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 22 to get 22.
Bring next digit (5) of the dividend behind the 22 and repeat the process: 225 / 51

Let's proceed to step 3:
The number 51 fits into 225 4 times, leaving a remainder of 21.
Write down 4 as next digit of the result. 
Result so far: 4.0
If we take 204 away from 225, we end up with 21.
Grab the next digit (5) from the dividend, add it to 21, then carry on: 215 / 51

Moving on to step 4:
If we divide 215 by 51, we get 4 and a remainder of 11.
Write down 4 as next digit of the result. 
Result so far: 44.0
Deduct 204 from 215 and we're left with 11.
Grab the next digit (7) from the dividend, add it to 11, then carry on: 117 / 51

Step 5:
117 divided by 51 is 2 with a remainder of 15.
The next digit of our result is 2. 
Result so far: 442.0
Subtract 102 from 117 to get 15.
Take the next digit (9) from the dividend and append it to 15, then repeat: 159 / 51

Advancing to step 6:
51 goes into 159 3 times with a remainder of 6.
Write down 3 as next digit of the result. 
Result so far: 4423.0
Deduct 153 from 159 and we're left with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Advancing to step 7:
51 can be fit into 60 1 times, resulting in a remainder of 9.
Use 1 as the next digit of our solution. 
Result so far: 4423.1
If we subtract 51 from 60, we get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

On to step 8:
The number 51 fits into 90 1 times, leaving a remainder of 39.
The number 1 becomes the next digit in our result. 
Result so far: 4423.11
Subtracting 51 from 90 leaves us with 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

The final result is 4423.11 with a remainder of 0.039.