We look at the division of 418621 by 51 
The aim is to understand the frequency of 51 in 418621.

Moving on to step 1:
If we divide 4 by 51, we get 0 and a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Bring next digit (1) of the dividend behind the 4 and repeat the process: 41 / 51

On to step 2:
51 goes into 41 0 times with a remainder of 41.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 41 after subtracting 0 from 41.
Take the next digit (8) from the dividend and append it to 41, then repeat: 418 / 51

Moving on to step 3:
When dividing 418 by 51, we get 8 with a remainder of 10.
The next digit of our result is 8. 
Result so far: 8.0
If we take 408 away from 418, we end up with 10.
Include the next digit (6) from the dividend after 10, then repeat: 106 / 51

Going ahead to step 4:
If we divide 106 by 51, we get 2 and a remainder of 4.
The number 2 becomes the next digit in our result. 
Result so far: 82.0
Subtracting 102 from 106 leaves us with 4.
Grab the next digit (2) from the dividend, add it to 4, then carry on: 42 / 51

Let's proceed to step 5:
51 can be fit into 42 0 times, resulting in a remainder of 42.
The next digit of our result is 0. 
Result so far: 820.0
The remainder is 42 after subtracting 0 from 42.
Include the next digit (1) from the dividend after 42, then repeat: 421 / 51

On to step 6:
421 divided by 51 is 8 with a remainder of 13.
Record the quotient 8 as the next digit in the result. 
Result so far: 8208.0
The remainder is 13 after subtracting 408 from 421.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Let's proceed to step 7:
The number 51 fits into 130 2 times, leaving a remainder of 28.
The number 2 becomes the next digit in our result. 
Result so far: 8208.2
Subtracting 102 from 130 leaves us with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Step 8:
51 goes into 280 5 times with a remainder of 25.
Write down 5 as next digit of the result. 
Result so far: 8208.25
Subtract 255 from 280 to get 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Going ahead to step 9:
The number 51 fits into 250 4 times, leaving a remainder of 46.
Record the quotient 4 as the next digit in the result. 
Result so far: 8208.254
If we subtract 204 from 250, we get 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

On to step 10:
When dividing 460 by 51, we get 9 with a remainder of 1.
Record the quotient 9 as the next digit in the result. 
Result so far: 8208.2549
Subtracting 459 from 460 leaves us with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Going ahead to step 11:
51 goes into 10 0 times with a remainder of 10.
Record the quotient 0 as the next digit in the result. 
Result so far: 8208.2549
Deduct 0 from 10 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 12:
If we divide 100 by 51, we get 1 and a remainder of 49.
Use 1 as the next digit of our solution. 
Result so far: 8208.254901
If we take 51 away from 100, we end up with 49.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

Moving on to step 13:
51 goes into 490 9 times with a remainder of 31.
Record the quotient 9 as the next digit in the result. 
Result so far: 8208.2549019
Subtract 459 from 490 to 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.

Step 14:
If we divide 310 by 51, we get 6 and a remainder of 4.
The number 6 becomes the next digit in our result. 
Result so far: 8208.25490196
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.

The final outcome is 8208.25490196, with a leftover of 4e-09.