321791 divided by 66 
The aim is to understand the frequency of 66 in 321791.

Step 1:
66 can be fit into 3 0 times, resulting in a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Bring next digit (2) of the dividend behind the 3 and repeat the process: 32 / 66

Let's proceed to step 2:
The number 66 fits into 32 0 times, leaving a remainder of 32.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 32, we get 32.
Bring next digit (1) of the dividend behind the 32 and repeat the process: 321 / 66

Going ahead to step 3:
When dividing 321 by 66, we get 4 with a remainder of 57.
Put 4 as the next digit of the answer. 
Result so far: 4.0
The remainder is 57 after subtracting 264 from 321.
Take the next digit (7) from the dividend and append it to 57, then repeat: 577 / 66

Advancing to step 4:
When dividing 577 by 66, we get 8 with a remainder of 49.
Put 8 as the next digit of the answer. 
Result so far: 48.0
Subtracting 528 from 577 leaves us with 49.
Take the next digit (9) from the dividend and append it to 49, then repeat: 499 / 66

Let's proceed to step 5:
The number 66 fits into 499 7 times, leaving a remainder of 37.
Use 7 as the next digit of our solution. 
Result so far: 487.0
The remainder is 37 after subtracting 462 from 499.
Take the next digit (1) from the dividend and append it to 37, then repeat: 371 / 66

Advancing to step 6:
371 divided by 66 is 5 with a remainder of 41.
Use 5 as the next digit of our solution. 
Result so far: 4875.0
Subtracting 330 from 371 leaves us with 41.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

Advancing to step 7:
66 goes into 410 6 times with a remainder of 14.
Use 6 as the next digit of our solution. 
Result so far: 4875.6
The remainder is 14 after subtracting 396 from 410.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Moving on to step 8:
140 divided by 66 is 2 with a remainder of 8.
Put 2 as the next digit of the answer. 
Result so far: 4875.62
Subtract 132 from 140 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Moving on to step 9:
When dividing 80 by 66, we get 1 with a remainder of 14.
Record the quotient 1 as the next digit in the result. 
Result so far: 4875.621
If we take 66 away from 80, we end up with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Step 10:
If we divide 140 by 66, we get 2 and a remainder of 8.
The number 2 becomes the next digit in our result. 
Result so far: 4875.6212
Subtract 132 from 140 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Advancing to step 11:
The number 66 fits into 80 1 times, leaving a remainder of 14.
The next digit of our result is 1. 
Result so far: 4875.62121
If we take 66 away from 80, we end up with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Moving on to step 12:
66 can be fit into 140 2 times, resulting in a remainder of 8.
The next digit of our result is 2. 
Result so far: 4875.621212
The remainder is 8 after subtracting 132 from 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Advancing to step 13:
66 can be fit into 80 1 times, resulting in a remainder of 14.
Put 1 as the next digit of the answer. 
Result so far: 4875.6212121
If we subtract 66 from 80, we get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

On to step 14:
66 goes into 140 2 times with a remainder of 8.
Record the quotient 2 as the next digit in the result. 
Result so far: 4875.62121212
Deduct 132 from 140 and we're left with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

The final result is 4875.62121212 with a remainder of 8e-09.