356623 ÷ 51 
The aim is to understand the frequency of 51 in 356623.

Moving on 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
Subtract 0 from 3 to get 3.
Include the next digit (5) from the dividend after 3, then repeat: 35 / 51

Advancing to step 2:
51 goes into 35 0 times with a remainder of 35.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 35 leaves us with 35.
Fetch the next digit (6) from the dividend, attach it to 35 and continue: 356 / 51

Going ahead to step 3:
When dividing 356 by 51, we get 6 with a remainder of 50.
Put 6 as the next digit of the answer. 
Result so far: 6.0
The remainder is 50 after subtracting 306 from 356.
Append the next digit (6) from the dividend to 50 and continue with: 506 / 51

Advancing to step 4:
The number 51 fits into 506 9 times, leaving a remainder of 47.
The number 9 becomes the next digit in our result. 
Result so far: 69.0
Deduct 459 from 506 and we're left with 47.
Fetch the next digit (2) from the dividend, attach it to 47 and continue: 472 / 51

Moving on to step 5:
The number 51 fits into 472 9 times, leaving a remainder of 13.
Write down 9 as next digit of the result. 
Result so far: 699.0
If we take 459 away from 472, we end up with 13.
Fetch the next digit (3) from the dividend, attach it to 13 and continue: 133 / 51

Going ahead to step 6:
The number 51 fits into 133 2 times, leaving a remainder of 31.
Write down 2 as next digit of the result. 
Result so far: 6992.0
If we subtract 102 from 133, we get 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

On to step 7:
310 divided by 51 is 6 with a remainder of 4.
The number 6 becomes the next digit in our result. 
Result so far: 6992.6
Deduct 306 from 310 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Step 8:
The number 51 fits into 40 0 times, leaving a remainder of 40.
The number 0 becomes the next digit in our result. 
Result so far: 6992.6
Subtract 0 from 40 to get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Going ahead to step 9:
51 can be fit into 400 7 times, resulting in a remainder of 43.
Put 7 as the next digit of the answer. 
Result so far: 6992.607
The remainder is 43 after subtracting 357 from 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

On to step 10:
51 goes into 430 8 times with a remainder of 22.
Put 8 as the next digit of the answer. 
Result so far: 6992.6078
Subtracting 408 from 430 leaves us with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Going ahead to step 11:
When dividing 220 by 51, we get 4 with a remainder of 16.
The next digit of our result is 4. 
Result so far: 6992.60784
Deduct 204 from 220 and we're left with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Step 12:
51 can be fit into 160 3 times, resulting in a remainder of 7.
The number 3 becomes the next digit in our result. 
Result so far: 6992.607843
If we subtract 153 from 160, we get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Going ahead to step 13:
If we divide 70 by 51, we get 1 and a remainder of 19.
Use 1 as the next digit of our solution. 
Result so far: 6992.6078431
If we take 51 away from 70, we end up with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Advancing to step 14:
If we divide 190 by 51, we get 3 and a remainder of 37.
Use 3 as the next digit of our solution. 
Result so far: 6992.60784313
If we subtract 153 from 190, we get 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

The final outcome is 6992.60784313, with a leftover of 3.7e-08.