We look at the division of 515835 by 51 
The aim is to understand the frequency of 51 in 515835.

Moving on to step 1:
51 can be fit into 5 0 times, resulting in a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Append the next digit (1) from the dividend to 5 and continue with: 51 / 51

On to step 2:
51 can be fit into 51 1 times, resulting in a remainder of 0.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we subtract 51 from 51, we get 0.
Append the next digit (5) from the dividend to 0 and continue with: 5 / 51

Going ahead to step 3:
51 can be fit into 5 0 times, resulting in a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 10.0
Deduct 0 from 5 and we're left with 5.
Append the next digit (8) from the dividend to 5 and continue with: 58 / 51

Let's proceed to step 4:
The number 51 fits into 58 1 times, leaving a remainder of 7.
The number 1 becomes the next digit in our result. 
Result so far: 101.0
The remainder is 7 after subtracting 51 from 58.
Fetch the next digit (3) from the dividend, attach it to 7 and continue: 73 / 51

Going ahead to step 5:
51 can be fit into 73 1 times, resulting in a remainder of 22.
Record the quotient 1 as the next digit in the result. 
Result so far: 1011.0
Subtract 51 from 73 to get 22.
Fetch the next digit (5) from the dividend, attach it to 22 and continue: 225 / 51

Advancing to step 6:
When dividing 225 by 51, we get 4 with a remainder of 21.
The number 4 becomes the next digit in our result. 
Result so far: 10114.0
If we take 204 away from 225, we end up with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

On to step 7:
When dividing 210 by 51, we get 4 with a remainder of 6.
The number 4 becomes the next digit in our result. 
Result so far: 10114.4
If we subtract 204 from 210, we get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Let's proceed to step 8:
60 divided by 51 is 1 with a remainder of 9.
Use 1 as the next digit of our solution. 
Result so far: 10114.41
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 9:
51 goes into 90 1 times with a remainder of 39.
Write down 1 as next digit of the result. 
Result so far: 10114.411
If we subtract 51 from 90, we get 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

In conclusion, the division gives 10114.411 with a balance of 0.0039.