653508 divided by 51 
The aim is to understand the frequency of 51 in 653508.

Let's proceed to step 1:
If we divide 6 by 51, we get 0 and a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Take the next digit (5) from the dividend and append it to 6, then repeat: 65 / 51

Let's proceed to step 2:
If we divide 65 by 51, we get 1 and a remainder of 14.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Deduct 51 from 65 and we're left with 14.
Include the next digit (3) from the dividend after 14, then repeat: 143 / 51

Advancing to step 3:
If we divide 143 by 51, we get 2 and a remainder of 41.
The next digit of our result is 2. 
Result so far: 12.0
If we take 102 away from 143, we end up with 41.
Take the next digit (5) from the dividend and append it to 41, then repeat: 415 / 51

Moving on to step 4:
If we divide 415 by 51, we get 8 and a remainder of 7.
The number 8 becomes the next digit in our result. 
Result so far: 128.0
Deduct 408 from 415 and we're left with 7.
Grab the next digit (0) from the dividend, add it to 7, then carry on: 70 / 51

Step 5:
70 divided by 51 is 1 with a remainder of 19.
The next digit of our result is 1. 
Result so far: 1281.0
Subtracting 51 from 70 leaves us with 19.
Take the next digit (8) from the dividend and append it to 19, then repeat: 198 / 51

On to step 6:
51 can be fit into 198 3 times, resulting in a remainder of 45.
Put 3 as the next digit of the answer. 
Result so far: 12813.0
The remainder is 45 after subtracting 153 from 198.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Step 7:
450 divided by 51 is 8 with a remainder of 42.
The number 8 becomes the next digit in our result. 
Result so far: 12813.8
If we take 408 away from 450, we end up with 42.
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 8:
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: 12813.88
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 quotient of the division is 12813.88, and the remainder is 0.012.