988612 divided by 66 
The aim is to understand the frequency of 66 in 988612.

Advancing to step 1:
9 divided by 66 is 0 with a remainder of 9.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 9, we end up with 9.
Grab the next digit (8) from the dividend, add it to 9, then carry on: 98 / 66

Moving on to step 2:
When dividing 98 by 66, we get 1 with a remainder of 32.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtract 66 from 98 to get 32.
Fetch the next digit (8) from the dividend, attach it to 32 and continue: 328 / 66

On to step 3:
The number 66 fits into 328 4 times, leaving a remainder of 64.
Record the quotient 4 as the next digit in the result. 
Result so far: 14.0
Subtracting 264 from 328 leaves us with 64.
Take the next digit (6) from the dividend and append it to 64, then repeat: 646 / 66

On to step 4:
66 can be fit into 646 9 times, resulting in a remainder of 52.
Use 9 as the next digit of our solution. 
Result so far: 149.0
The remainder is 52 after subtracting 594 from 646.
Append the next digit (1) from the dividend to 52 and continue with: 521 / 66

Let's proceed to step 5:
521 divided by 66 is 7 with a remainder of 59.
Record the quotient 7 as the next digit in the result. 
Result so far: 1497.0
Deduct 462 from 521 and we're left with 59.
Fetch the next digit (2) from the dividend, attach it to 59 and continue: 592 / 66

Advancing to step 6:
The number 66 fits into 592 8 times, leaving a remainder of 64.
Record the quotient 8 as the next digit in the result. 
Result so far: 14978.0
If we subtract 528 from 592, we 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 7:
If we divide 640 by 66, we get 9 and a remainder of 46.
Use 9 as the next digit of our solution. 
Result so far: 14978.9
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.

Advancing to step 8:
460 divided by 66 is 6 with a remainder of 64.
The next digit of our result is 6. 
Result so far: 14978.96
If we subtract 396 from 460, we 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 9:
If we divide 640 by 66, we get 9 and a remainder of 46.
Use 9 as the next digit of our solution. 
Result so far: 14978.969
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 10:
66 goes into 460 6 times with a remainder of 64.
Put 6 as the next digit of the answer. 
Result so far: 14978.9696
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.

Let's proceed to step 11:
If we divide 640 by 66, we get 9 and a remainder of 46.
The number 9 becomes the next digit in our result. 
Result so far: 14978.96969
If we take 594 away from 640, we end up 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 12:
If we divide 460 by 66, we get 6 and a remainder of 64.
Record the quotient 6 as the next digit in the result. 
Result so far: 14978.969696
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.

Moving on to step 13:
The number 66 fits into 640 9 times, leaving a remainder of 46.
Write down 9 as next digit of the result. 
Result so far: 14978.9696969
If we subtract 594 from 640, 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.

Step 14:
66 can be fit into 460 6 times, resulting in a remainder of 64.
The next digit of our result is 6. 
Result so far: 14978.96969696
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.

The quotient of the division is 14978.96969696, and the remainder is 6.4e-08.