221304 divided by 66 
The aim is to understand the frequency of 66 in 221304.

Advancing to step 1:
If we divide 2 by 66, we get 0 and a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Include the next digit (2) from the dividend after 2, then repeat: 22 / 66

Step 2:
22 divided by 66 is 0 with a remainder of 22.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 22 to get 22.
Fetch the next digit (1) from the dividend, attach it to 22 and continue: 221 / 66

On to step 3:
66 can be fit into 221 3 times, resulting in a remainder of 23.
The next digit of our result is 3. 
Result so far: 3.0
If we take 198 away from 221, we end up with 23.
Include the next digit (3) from the dividend after 23, then repeat: 233 / 66

Advancing to step 4:
When dividing 233 by 66, we get 3 with a remainder of 35.
The next digit of our result is 3. 
Result so far: 33.0
Subtracting 198 from 233 leaves us with 35.
Grab the next digit (0) from the dividend, add it to 35, then carry on: 350 / 66

On to step 5:
66 goes into 350 5 times with a remainder of 20.
The number 5 becomes the next digit in our result. 
Result so far: 335.0
If we take 330 away from 350, we end up with 20.
Append the next digit (4) from the dividend to 20 and continue with: 204 / 66

Going ahead to step 6:
The number 66 fits into 204 3 times, leaving a remainder of 6.
Put 3 as the next digit of the answer. 
Result so far: 3353.0
The remainder is 6 after subtracting 198 from 204.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Going ahead to step 7:
If we divide 60 by 66, we get 0 and a remainder of 60.
Put 0 as the next digit of the answer. 
Result so far: 3353.0
Subtract 0 from 60 to get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Moving on to step 8:
The number 66 fits into 600 9 times, leaving a remainder of 6.
Record the quotient 9 as the next digit in the result. 
Result so far: 3353.09
Subtract 594 from 600 to get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

On to step 9:
When dividing 60 by 66, we get 0 with a remainder of 60.
Write down 0 as next digit of the result. 
Result so far: 3353.09
If we subtract 0 from 60, we get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Moving on to step 10:
The number 66 fits into 600 9 times, leaving a remainder of 6.
The number 9 becomes the next digit in our result. 
Result so far: 3353.0909
Subtracting 594 from 600 leaves us with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Let's proceed to step 11:
60 divided by 66 is 0 with a remainder of 60.
The next digit of our result is 0. 
Result so far: 3353.0909
Deduct 0 from 60 and we're left with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

On to step 12:
600 divided by 66 is 9 with a remainder of 6.
The next digit of our result is 9. 
Result so far: 3353.090909
Subtracting 594 from 600 leaves us with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Moving on to step 13:
If we divide 60 by 66, we get 0 and a remainder of 60.
Put 0 as the next digit of the answer. 
Result so far: 3353.090909
The remainder is 60 after subtracting 0 from 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Let's proceed to step 14:
66 goes into 600 9 times with a remainder of 6.
The next digit of our result is 9. 
Result so far: 3353.09090909
Deduct 594 from 600 and we're left with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

After the division, we end up with 3353.09090909 and a remainder of 6e-09.