Let's divide 791987 by 66
The aim is to understand the frequency of 66 in 791987.

Step 1:
66 can be fit into 7 0 times, resulting in a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Fetch the next digit (9) from the dividend, attach it to 7 and continue: 79 / 66

Let's proceed to step 2:
When dividing 79 by 66, we get 1 with a remainder of 13.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we subtract 66 from 79, we get 13.
Grab the next digit (1) from the dividend, add it to 13, then carry on: 131 / 66

Advancing to step 3:
66 goes into 131 1 times with a remainder of 65.
Record the quotient 1 as the next digit in the result. 
Result so far: 11.0
Subtracting 66 from 131 leaves us with 65.
Append the next digit (9) from the dividend to 65 and continue with: 659 / 66

Advancing to step 4:
66 can be fit into 659 9 times, resulting in a remainder of 65.
The number 9 becomes the next digit in our result. 
Result so far: 119.0
Subtracting 594 from 659 leaves us with 65.
Append the next digit (8) from the dividend to 65 and continue with: 658 / 66

Moving on to step 5:
The number 66 fits into 658 9 times, leaving a remainder of 64.
Use 9 as the next digit of our solution. 
Result so far: 1199.0
If we take 594 away from 658, we end up with 64.
Take the next digit (7) from the dividend and append it to 64, then repeat: 647 / 66

Step 6:
66 goes into 647 9 times with a remainder of 53.
Record the quotient 9 as the next digit in the result. 
Result so far: 11999.0
Deduct 594 from 647 and we're left with 53.
Since there are no more digits in the dividend, we add a zero to the remainder making it 530, and continue the process.

Advancing to step 7:
66 goes into 530 8 times with a remainder of 2.
Use 8 as the next digit of our solution. 
Result so far: 11999.8
Subtract 528 from 530 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Going ahead to step 8:
When dividing 20 by 66, we get 0 with a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 11999.8
Subtracting 0 from 20 leaves us with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Going ahead to step 9:
When dividing 200 by 66, we get 3 with a remainder of 2.
Write down 3 as next digit of the result. 
Result so far: 11999.803
Subtracting 198 from 200 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Step 10:
When dividing 20 by 66, we get 0 with a remainder of 20.
The number 0 becomes the next digit in our result. 
Result so far: 11999.803
If we subtract 0 from 20, we get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Let's proceed to step 11:
66 goes into 200 3 times with a remainder of 2.
Write down 3 as next digit of the result. 
Result so far: 11999.80303
If we subtract 198 from 200, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Step 12:
20 divided by 66 is 0 with a remainder of 20.
Write down 0 as next digit of the result. 
Result so far: 11999.80303
Deduct 0 from 20 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

On to step 13:
When dividing 200 by 66, we get 3 with a remainder of 2.
The next digit of our result is 3. 
Result so far: 11999.8030303
Deduct 198 from 200 and we're left with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Going ahead to step 14:
20 divided by 66 is 0 with a remainder of 20.
The next digit of our result is 0. 
Result so far: 11999.8030303
Subtract 0 from 20 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

In conclusion, the division gives 11999.8030303 with a balance of 2e-08.