718427 ÷ 51 
The aim is to understand the frequency of 51 in 718427.

Step 1:
If we divide 7 by 51, we get 0 and a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Grab the next digit (1) from the dividend, add it to 7, then carry on: 71 / 51

Going ahead to step 2:
71 divided by 51 is 1 with a remainder of 20.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we take 51 away from 71, we end up with 20.
Fetch the next digit (8) from the dividend, attach it to 20 and continue: 208 / 51

Let's proceed to step 3:
51 goes into 208 4 times with a remainder of 4.
Use 4 as the next digit of our solution. 
Result so far: 14.0
If we take 204 away from 208, we end up with 4.
Bring next digit (4) of the dividend behind the 4 and repeat the process: 44 / 51

Advancing to step 4:
51 goes into 44 0 times with a remainder of 44.
The next digit of our result is 0. 
Result so far: 140.0
If we take 0 away from 44, we end up with 44.
Bring next digit (2) of the dividend behind the 44 and repeat the process: 442 / 51

On to step 5:
When dividing 442 by 51, we get 8 with a remainder of 34.
Put 8 as the next digit of the answer. 
Result so far: 1408.0
Deduct 408 from 442 and we're left with 34.
Append the next digit (7) from the dividend to 34 and continue with: 347 / 51

Let's proceed to step 6:
If we divide 347 by 51, we get 6 and a remainder of 41.
Write down 6 as next digit of the result. 
Result so far: 14086.0
Deduct 306 from 347 and we're left with 41.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

Going ahead to step 7:
410 divided by 51 is 8 with a remainder of 2.
Record the quotient 8 as the next digit in the result. 
Result so far: 14086.8
Subtracting 408 from 410 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Step 8:
51 goes into 20 0 times with a remainder of 20.
Use 0 as the next digit of our solution. 
Result so far: 14086.8
If we subtract 0 from 20, we get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Moving on to step 9:
51 can be fit into 200 3 times, resulting in a remainder of 47.
The next digit of our result is 3. 
Result so far: 14086.803
The remainder is 47 after subtracting 153 from 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

Let's proceed to step 10:
51 can be fit into 470 9 times, resulting in a remainder of 11.
The number 9 becomes the next digit in our result. 
Result so far: 14086.8039
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.

Advancing to step 11:
51 can be fit into 110 2 times, resulting in a remainder of 8.
Write down 2 as next digit of the result. 
Result so far: 14086.80392
Subtract 102 from 110 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Step 12:
If we divide 80 by 51, we get 1 and a remainder of 29.
Write down 1 as next digit of the result. 
Result so far: 14086.803921
The remainder is 29 after subtracting 51 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

On to step 13:
The number 51 fits into 290 5 times, leaving a remainder of 35.
The number 5 becomes the next digit in our result. 
Result so far: 14086.8039215
If we subtract 255 from 290, we get 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 14:
350 divided by 51 is 6 with a remainder of 44.
Record the quotient 6 as the next digit in the result. 
Result so far: 14086.80392156
Subtract 306 from 350 to get 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

The final result is 14086.80392156 with a remainder of 4.4e-08.