We're dividing 919966 by 66 
The aim is to understand the frequency of 66 in 919966.

Let's proceed to step 1:
If we divide 9 by 66, we get 0 and a remainder of 9.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 9 and we're left with 9.
Take the next digit (1) from the dividend and append it to 9, then repeat: 91 / 66

Going ahead to step 2:
66 can be fit into 91 1 times, resulting in a remainder of 25.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we take 66 away from 91, we end up with 25.
Append the next digit (9) from the dividend to 25 and continue with: 259 / 66

Moving on to step 3:
66 goes into 259 3 times with a remainder of 61.
The number 3 becomes the next digit in our result. 
Result so far: 13.0
Subtracting 198 from 259 leaves us with 61.
Include the next digit (9) from the dividend after 61, then repeat: 619 / 66

Advancing to step 4:
If we divide 619 by 66, we get 9 and a remainder of 25.
Use 9 as the next digit of our solution. 
Result so far: 139.0
If we take 594 away from 619, we end up with 25.
Bring next digit (6) of the dividend behind the 25 and repeat the process: 256 / 66

On to step 5:
When dividing 256 by 66, we get 3 with a remainder of 58.
The next digit of our result is 3. 
Result so far: 1393.0
If we subtract 198 from 256, we get 58.
Grab the next digit (6) from the dividend, add it to 58, then carry on: 586 / 66

On to step 6:
66 goes into 586 8 times with a remainder of 58.
Put 8 as the next digit of the answer. 
Result so far: 13938.0
If we take 528 away from 586, we end up with 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

On to step 7:
The number 66 fits into 580 8 times, leaving a remainder of 52.
The number 8 becomes the next digit in our result. 
Result so far: 13938.8
If we subtract 528 from 580, we get 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

On to step 8:
66 can be fit into 520 7 times, resulting in a remainder of 58.
Write down 7 as next digit of the result. 
Result so far: 13938.87
Subtract 462 from 520 to get 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Moving on to step 9:
66 can be fit into 580 8 times, resulting in a remainder of 52.
The next digit of our result is 8. 
Result so far: 13938.878
If we subtract 528 from 580, we get 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Let's proceed to step 10:
When dividing 520 by 66, we get 7 with a remainder of 58.
Put 7 as the next digit of the answer. 
Result so far: 13938.8787
Subtracting 462 from 520 leaves us with 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Moving on to step 11:
The number 66 fits into 580 8 times, leaving a remainder of 52.
Use 8 as the next digit of our solution. 
Result so far: 13938.87878
The remainder is 52 after subtracting 528 from 580.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Advancing to step 12:
When dividing 520 by 66, we get 7 with a remainder of 58.
Write down 7 as next digit of the result. 
Result so far: 13938.878787
Subtracting 462 from 520 leaves us with 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Going ahead to step 13:
580 divided by 66 is 8 with a remainder of 52.
Write down 8 as next digit of the result. 
Result so far: 13938.8787878
Subtracting 528 from 580 leaves us with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Advancing to step 14:
The number 66 fits into 520 7 times, leaving a remainder of 58.
The next digit of our result is 7. 
Result so far: 13938.87878787
Subtract 462 from 520 to get 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

After the division, we end up with 13938.87878787 and a remainder of 5.8e-08.