We look at the division of 355541 by 51 
The aim is to understand the frequency of 51 in 355541.

Step 1:
51 goes into 3 0 times with a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Include the next digit (5) from the dividend after 3, then repeat: 35 / 51

Moving on to step 2:
The number 51 fits into 35 0 times, leaving a remainder of 35.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 35 to get 35.
Bring next digit (5) of the dividend behind the 35 and repeat the process: 355 / 51

Step 3:
If we divide 355 by 51, we get 6 and a remainder of 49.
Put 6 as the next digit of the answer. 
Result so far: 6.0
The remainder is 49 after subtracting 306 from 355.
Grab the next digit (5) from the dividend, add it to 49, then carry on: 495 / 51

Let's proceed to step 4:
The number 51 fits into 495 9 times, leaving a remainder of 36.
Use 9 as the next digit of our solution. 
Result so far: 69.0
Deduct 459 from 495 and we're left with 36.
Append the next digit (4) from the dividend to 36 and continue with: 364 / 51

Step 5:
If we divide 364 by 51, we get 7 and a remainder of 7.
The number 7 becomes the next digit in our result. 
Result so far: 697.0
Subtract 357 from 364 to get 7.
Fetch the next digit (1) from the dividend, attach it to 7 and continue: 71 / 51

Moving on to step 6:
51 goes into 71 1 times with a remainder of 20.
Use 1 as the next digit of our solution. 
Result so far: 6971.0
If we take 51 away from 71, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Advancing to step 7:
If we divide 200 by 51, we get 3 and a remainder of 47.
Write down 3 as next digit of the result. 
Result so far: 6971.3
If we subtract 153 from 200, we get 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

Moving on to step 8:
When dividing 470 by 51, we get 9 with a remainder of 11.
Use 9 as the next digit of our solution. 
Result so far: 6971.39
Subtract 459 from 470 to get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

On to step 9:
51 goes into 110 2 times with a remainder of 8.
Record the quotient 2 as the next digit in the result. 
Result so far: 6971.392
The remainder is 8 after subtracting 102 from 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Moving on to step 10:
51 can be fit into 80 1 times, resulting in a remainder of 29.
Put 1 as the next digit of the answer. 
Result so far: 6971.3921
Subtract 51 from 80 to get 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Advancing to step 11:
51 can be fit into 290 5 times, resulting in a remainder of 35.
Record the quotient 5 as the next digit in the result. 
Result so far: 6971.39215
Deduct 255 from 290 and we're left with 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Let's proceed to step 12:
If we divide 350 by 51, we get 6 and a remainder of 44.
Write down 6 as next digit of the result. 
Result so far: 6971.392156
If we take 306 away from 350, we end up with 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

On to step 13:
The number 51 fits into 440 8 times, leaving a remainder of 32.
Use 8 as the next digit of our solution. 
Result so far: 6971.3921568
If we subtract 408 from 440, we get 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Moving on to step 14:
The number 51 fits into 320 6 times, leaving a remainder of 14.
Write down 6 as next digit of the result. 
Result so far: 6971.39215686
If we subtract 306 from 320, we get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

The final outcome is 6971.39215686, with a leftover of 1.4e-08.