We look at the division of 486866 by 51 
The aim is to understand the frequency of 51 in 486866.

Moving on to step 1:
51 can be fit into 4 0 times, resulting in a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Grab the next digit (8) from the dividend, add it to 4, then carry on: 48 / 51

Let's proceed to step 2:
51 goes into 48 0 times with a remainder of 48.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 48 after subtracting 0 from 48.
Append the next digit (6) from the dividend to 48 and continue with: 486 / 51

Moving on to step 3:
486 divided by 51 is 9 with a remainder of 27.
Record the quotient 9 as the next digit in the result. 
Result so far: 9.0
Subtract 459 from 486 to get 27.
Bring next digit (8) of the dividend behind the 27 and repeat the process: 278 / 51

Moving on to step 4:
51 goes into 278 5 times with a remainder of 23.
Use 5 as the next digit of our solution. 
Result so far: 95.0
The remainder is 23 after subtracting 255 from 278.
Fetch the next digit (6) from the dividend, attach it to 23 and continue: 236 / 51

Moving on to step 5:
51 can be fit into 236 4 times, resulting in a remainder of 32.
Put 4 as the next digit of the answer. 
Result so far: 954.0
Subtract 204 from 236 to get 32.
Grab the next digit (6) from the dividend, add it to 32, then carry on: 326 / 51

Let's proceed to step 6:
The number 51 fits into 326 6 times, leaving a remainder of 20.
Write down 6 as next digit of the result. 
Result so far: 9546.0
Deduct 306 from 326 and we're left 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.

Going ahead to step 7:
200 divided by 51 is 3 with a remainder of 47.
Record the quotient 3 as the next digit in the result. 
Result so far: 9546.3
Subtracting 153 from 200 leaves us with 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

On to step 8:
The number 51 fits into 470 9 times, leaving a remainder of 11.
The number 9 becomes the next digit in our result. 
Result so far: 9546.39
The remainder is 11 after subtracting 459 from 470.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Step 9:
51 can be fit into 110 2 times, resulting in a remainder of 8.
The number 2 becomes the next digit in our result. 
Result so far: 9546.392
If we take 102 away from 110, we end up with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

On to step 10:
The number 51 fits into 80 1 times, leaving a remainder of 29.
Write down 1 as next digit of the result. 
Result so far: 9546.3921
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.

On to step 11:
51 goes into 290 5 times with a remainder of 35.
Put 5 as the next digit of the answer. 
Result so far: 9546.39215
If we take 255 away from 290, we end up 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.

Step 12:
The number 51 fits into 350 6 times, leaving a remainder of 44.
Use 6 as the next digit of our solution. 
Result so far: 9546.392156
Subtracting 306 from 350 leaves us 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.

Advancing to step 13:
If we divide 440 by 51, we get 8 and a remainder of 32.
Put 8 as the next digit of the answer. 
Result so far: 9546.3921568
Subtract 408 from 440 to 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.

Advancing to step 14:
51 can be fit into 320 6 times, resulting in a remainder of 14.
Write down 6 as next digit of the result. 
Result so far: 9546.39215686
If we take 306 away from 320, we end up with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Our division results in 9546.39215686 with a remaining 1.4e-08.