922581 divided by 66 
The aim is to understand the frequency of 66 in 922581.

Step 1:
9 divided by 66 is 0 with a remainder of 9.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 9 to get 9.
Include the next digit (2) from the dividend after 9, then repeat: 92 / 66

Going ahead to step 2:
66 can be fit into 92 1 times, resulting in a remainder of 26.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we take 66 away from 92, we end up with 26.
Include the next digit (2) from the dividend after 26, then repeat: 262 / 66

Step 3:
When dividing 262 by 66, we get 3 with a remainder of 64.
The number 3 becomes the next digit in our result. 
Result so far: 13.0
Subtracting 198 from 262 leaves us with 64.
Append the next digit (5) from the dividend to 64 and continue with: 645 / 66

Step 4:
The number 66 fits into 645 9 times, leaving a remainder of 51.
Record the quotient 9 as the next digit in the result. 
Result so far: 139.0
Subtract 594 from 645 to get 51.
Grab the next digit (8) from the dividend, add it to 51, then carry on: 518 / 66

On to step 5:
If we divide 518 by 66, we get 7 and a remainder of 56.
The number 7 becomes the next digit in our result. 
Result so far: 1397.0
If we take 462 away from 518, we end up with 56.
Take the next digit (1) from the dividend and append it to 56, then repeat: 561 / 66

Step 6:
The number 66 fits into 561 8 times, leaving a remainder of 33.
Put 8 as the next digit of the answer. 
Result so far: 13978.0
Deduct 528 from 561 and we're left with 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Let's proceed to step 7:
When dividing 330 by 66, we get 5 with a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 13978.5
If we subtract 330 from 330, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 8:
66 can be fit into 0 0 times, resulting in a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 13978.5
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 9:
When dividing 0 by 66, we get 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 13978.5
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

After the division, we end up with 13978.5 and a remainder of 0.0.