Let's divide 786015 by 51
The aim is to understand the frequency of 51 in 786015.

Step 1:
7 divided by 51 is 0 with a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Take the next digit (8) from the dividend and append it to 7, then repeat: 78 / 51

Let's proceed to step 2:
If we divide 78 by 51, we get 1 and a remainder of 27.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtracting 51 from 78 leaves us with 27.
Include the next digit (6) from the dividend after 27, then repeat: 276 / 51

Going ahead to step 3:
If we divide 276 by 51, we get 5 and a remainder of 21.
Use 5 as the next digit of our solution. 
Result so far: 15.0
Subtract 255 from 276 to get 21.
Fetch the next digit (0) from the dividend, attach it to 21 and continue: 210 / 51

Step 4:
If we divide 210 by 51, we get 4 and a remainder of 6.
Use 4 as the next digit of our solution. 
Result so far: 154.0
If we subtract 204 from 210, we get 6.
Append the next digit (1) from the dividend to 6 and continue with: 61 / 51

Step 5:
The number 51 fits into 61 1 times, leaving a remainder of 10.
The number 1 becomes the next digit in our result. 
Result so far: 1541.0
Subtract 51 from 61 to get 10.
Bring next digit (5) of the dividend behind the 10 and repeat the process: 105 / 51

Advancing to step 6:
105 divided by 51 is 2 with a remainder of 3.
The number 2 becomes the next digit in our result. 
Result so far: 15412.0
Subtract 102 from 105 to get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Going ahead to step 7:
The number 51 fits into 30 0 times, leaving a remainder of 30.
The next digit of our result is 0. 
Result so far: 15412.0
If we subtract 0 from 30, we get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Advancing to step 8:
When dividing 300 by 51, we get 5 with a remainder of 45.
Write down 5 as next digit of the result. 
Result so far: 15412.05
Deduct 255 from 300 and we're left 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.

Going ahead to step 9:
When dividing 450 by 51, we get 8 with a remainder of 42.
The number 8 becomes the next digit in our result. 
Result so far: 15412.058
The remainder is 42 after subtracting 408 from 450.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Let's proceed to step 10:
When dividing 420 by 51, we get 8 with a remainder of 12.
Record the quotient 8 as the next digit in the result. 
Result so far: 15412.0588
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.

The final result is 15412.0588 with a remainder of 0.00012.