We look at the division of 912976 by 66 
The aim is to understand the frequency of 66 in 912976.

Advancing to step 1:
The number 66 fits into 9 0 times, leaving a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 9 and we're left with 9.
Grab the next digit (1) from the dividend, add it to 9, then carry on: 91 / 66

Step 2:
66 can be fit into 91 1 times, resulting in a remainder of 25.
The next digit of our result is 1. 
Result so far: 1.0
Subtract 66 from 91 to get 25.
Take the next digit (2) from the dividend and append it to 25, then repeat: 252 / 66

Advancing to step 3:
When dividing 252 by 66, we get 3 with a remainder of 54.
Use 3 as the next digit of our solution. 
Result so far: 13.0
If we subtract 198 from 252, we get 54.
Take the next digit (9) from the dividend and append it to 54, then repeat: 549 / 66

Let's proceed to step 4:
If we divide 549 by 66, we get 8 and a remainder of 21.
Write down 8 as next digit of the result. 
Result so far: 138.0
Deduct 528 from 549 and we're left with 21.
Include the next digit (7) from the dividend after 21, then repeat: 217 / 66

On to step 5:
When dividing 217 by 66, we get 3 with a remainder of 19.
The next digit of our result is 3. 
Result so far: 1383.0
If we subtract 198 from 217, we get 19.
Include the next digit (6) from the dividend after 19, then repeat: 196 / 66

Moving on to step 6:
196 divided by 66 is 2 with a remainder of 64.
The next digit of our result is 2. 
Result so far: 13832.0
Subtract 132 from 196 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.

Moving on to step 7:
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: 13832.9
Subtracting 594 from 640 leaves us 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.

On to step 8:
66 can be fit into 460 6 times, resulting in a remainder of 64.
Put 6 as the next digit of the answer. 
Result so far: 13832.96
If we take 396 away from 460, we end up 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.

Advancing to step 9:
The number 66 fits into 640 9 times, leaving a remainder of 46.
Use 9 as the next digit of our solution. 
Result so far: 13832.969
Subtracting 594 from 640 leaves us 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:
If we divide 460 by 66, we get 6 and a remainder of 64.
The number 6 becomes the next digit in our result. 
Result so far: 13832.9696
Deduct 396 from 460 and we're left 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.

On to step 11:
640 divided by 66 is 9 with a remainder of 46.
Record the quotient 9 as the next digit in the result. 
Result so far: 13832.96969
Subtract 594 from 640 to 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.

Moving on to step 12:
66 goes into 460 6 times with a remainder of 64.
Write down 6 as next digit of the result. 
Result so far: 13832.969696
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 13:
When dividing 640 by 66, we get 9 with a remainder of 46.
The number 9 becomes the next digit in our result. 
Result so far: 13832.9696969
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.

Moving on to step 14:
66 goes into 460 6 times with a remainder of 64.
Use 6 as the next digit of our solution. 
Result so far: 13832.96969696
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.

After the division, we end up with 13832.96969696 and a remainder of 6.4e-08.