Let's divide 51086110 by 66
The aim is to understand the frequency of 66 in 51086110.

Advancing to step 1:
5 divided by 66 is 0 with a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Bring next digit (1) of the dividend behind the 5 and repeat the process: 51 / 66

Advancing to step 2:
66 can be fit into 51 0 times, resulting in a remainder of 51.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 51, we end up with 51.
Grab the next digit (0) from the dividend, add it to 51, then carry on: 510 / 66

Advancing to step 3:
When dividing 510 by 66, we get 7 with a remainder of 48.
Use 7 as the next digit of our solution. 
Result so far: 7.0
The remainder is 48 after subtracting 462 from 510.
Take the next digit (8) from the dividend and append it to 48, then repeat: 488 / 66

Step 4:
When dividing 488 by 66, we get 7 with a remainder of 26.
Use 7 as the next digit of our solution. 
Result so far: 77.0
If we take 462 away from 488, we end up with 26.
Bring next digit (6) of the dividend behind the 26 and repeat the process: 266 / 66

Step 5:
266 divided by 66 is 4 with a remainder of 2.
Use 4 as the next digit of our solution. 
Result so far: 774.0
Subtract 264 from 266 to get 2.
Bring next digit (1) of the dividend behind the 2 and repeat the process: 21 / 66

Let's proceed to step 6:
The number 66 fits into 21 0 times, leaving a remainder of 21.
Write down 0 as next digit of the result. 
Result so far: 7740.0
If we subtract 0 from 21, we get 21.
Include the next digit (1) from the dividend after 21, then repeat: 211 / 66

Moving on to step 7:
66 goes into 211 3 times with a remainder of 13.
Use 3 as the next digit of our solution. 
Result so far: 77403.0
Deduct 198 from 211 and we're left with 13.
Bring next digit (0) of the dividend behind the 13 and repeat the process: 130 / 66

Moving on to step 8:
66 can be fit into 130 1 times, resulting in a remainder of 64.
The next digit of our result is 1. 
Result so far: 774031.0
Subtract 66 from 130 to get 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

On to step 9:
640 divided by 66 is 9 with a remainder of 46.
The number 9 becomes the next digit in our result. 
Result so far: 774031.9
Deduct 594 from 640 and we're left with 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Step 10:
66 goes into 460 6 times with a remainder of 64.
Record the quotient 6 as the next digit in the result. 
Result so far: 774031.96
Subtracting 396 from 460 leaves us with 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Let's proceed to step 11:
If we divide 640 by 66, we get 9 and a remainder of 46.
Write down 9 as next digit of the result. 
Result so far: 774031.969
The remainder is 46 after subtracting 594 from 640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Going ahead to step 12:
If we divide 460 by 66, we get 6 and a remainder of 64.
Put 6 as the next digit of the answer. 
Result so far: 774031.9696
Subtract 396 from 460 to get 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Advancing to step 13:
If we divide 640 by 66, we get 9 and a remainder of 46.
Put 9 as the next digit of the answer. 
Result so far: 774031.96969
The remainder is 46 after subtracting 594 from 640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Moving on to step 14:
460 divided by 66 is 6 with a remainder of 64.
Use 6 as the next digit of our solution. 
Result so far: 774031.969696
The remainder is 64 after subtracting 396 from 460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

On to step 15:
66 can be fit into 640 9 times, resulting in a remainder of 46.
Put 9 as the next digit of the answer. 
Result so far: 774031.9696969
The remainder is 46 after subtracting 594 from 640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Let's proceed to step 16:
460 divided by 66 is 6 with a remainder of 64.
The next digit of our result is 6. 
Result so far: 774031.96969696
Subtract 396 from 460 to get 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

The quotient of the division is 774031.96969696, and the remainder is 6.4e-08.