357507 ÷ 51 
The aim is to understand the frequency of 51 in 357507.

Let's proceed to step 1:
The number 51 fits into 3 0 times, leaving a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Append the next digit (5) from the dividend to 3 and continue with: 35 / 51

On to step 2:
The number 51 fits into 35 0 times, leaving a remainder of 35.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 35, we end up with 35.
Bring next digit (7) of the dividend behind the 35 and repeat the process: 357 / 51

Advancing to step 3:
When dividing 357 by 51, we get 7 with a remainder of 0.
Record the quotient 7 as the next digit in the result. 
Result so far: 7.0
Subtract 357 from 357 to get 0.
Append the next digit (5) from the dividend to 0 and continue with: 5 / 51

Moving on to step 4:
5 divided by 51 is 0 with a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 70.0
Subtracting 0 from 5 leaves us with 5.
Include the next digit (0) from the dividend after 5, then repeat: 50 / 51

Advancing to step 5:
51 goes into 50 0 times with a remainder of 50.
The number 0 becomes the next digit in our result. 
Result so far: 700.0
Subtract 0 from 50 to get 50.
Include the next digit (7) from the dividend after 50, then repeat: 507 / 51

Moving on to step 6:
The number 51 fits into 507 9 times, leaving a remainder of 48.
Write down 9 as next digit of the result. 
Result so far: 7009.0
Subtracting 459 from 507 leaves us 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.

On to step 7:
If we divide 480 by 51, we get 9 and a remainder of 21.
Record the quotient 9 as the next digit in the result. 
Result so far: 7009.9
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 8:
The number 51 fits into 210 4 times, leaving a remainder of 6.
Write down 4 as next digit of the result. 
Result so far: 7009.94
Subtract 204 from 210 to 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.

Step 9:
60 divided by 51 is 1 with a remainder of 9.
Record the quotient 1 as the next digit in the result. 
Result so far: 7009.941
The remainder is 9 after subtracting 51 from 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Let's proceed to step 10:
If we divide 90 by 51, we get 1 and a remainder of 39.
Put 1 as the next digit of the answer. 
Result so far: 7009.9411
If we take 51 away from 90, we end up 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 7009.9411 with a remainder of 0.00039.