We're dividing 55204896 by 51 
The aim is to understand the frequency of 51 in 55204896.

On to step 1:
When dividing 5 by 51, we get 0 with a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Append the next digit (5) from the dividend to 5 and continue with: 55 / 51

Step 2:
When dividing 55 by 51, we get 1 with a remainder of 4.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtract 51 from 55 to get 4.
Take the next digit (2) from the dividend and append it to 4, then repeat: 42 / 51

Going ahead to step 3:
The number 51 fits into 42 0 times, leaving a remainder of 42.
The number 0 becomes the next digit in our result. 
Result so far: 10.0
If we take 0 away from 42, we end up with 42.
Include the next digit (0) from the dividend after 42, then repeat: 420 / 51

Advancing to step 4:
51 goes into 420 8 times with a remainder of 12.
The number 8 becomes the next digit in our result. 
Result so far: 108.0
If we take 408 away from 420, we end up with 12.
Grab the next digit (4) from the dividend, add it to 12, then carry on: 124 / 51

Let's proceed to step 5:
When dividing 124 by 51, we get 2 with a remainder of 22.
Record the quotient 2 as the next digit in the result. 
Result so far: 1082.0
If we take 102 away from 124, we end up with 22.
Take the next digit (8) from the dividend and append it to 22, then repeat: 228 / 51

Step 6:
When dividing 228 by 51, we get 4 with a remainder of 24.
The next digit of our result is 4. 
Result so far: 10824.0
If we subtract 204 from 228, we get 24.
Fetch the next digit (9) from the dividend, attach it to 24 and continue: 249 / 51

Step 7:
When dividing 249 by 51, we get 4 with a remainder of 45.
The next digit of our result is 4. 
Result so far: 108244.0
If we take 204 away from 249, we end up with 45.
Append the next digit (6) from the dividend to 45 and continue with: 456 / 51

On to step 8:
51 goes into 456 8 times with a remainder of 48.
The number 8 becomes the next digit in our result. 
Result so far: 1082448.0
Deduct 408 from 456 and we're left with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Advancing to step 9:
51 goes into 480 9 times with a remainder of 21.
Record the quotient 9 as the next digit in the result. 
Result so far: 1082448.9
Subtract 459 from 480 to get 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Step 10:
51 can be fit into 210 4 times, resulting in a remainder of 6.
Record the quotient 4 as the next digit in the result. 
Result so far: 1082448.94
Deduct 204 from 210 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.

Moving on to step 11:
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: 1082448.941
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.

Going ahead to step 12:
When dividing 90 by 51, we get 1 with a remainder of 39.
Record the quotient 1 as the next digit in the result. 
Result so far: 1082448.9411
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.

After the division, we end up with 1082448.9411 and a remainder of 0.00039.