458636 ÷ 66 
The aim is to understand the frequency of 66 in 458636.

On to step 1:
If we divide 4 by 66, we get 0 and a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Grab the next digit (5) from the dividend, add it to 4, then carry on: 45 / 66

Going ahead to step 2:
When dividing 45 by 66, we get 0 with a remainder of 45.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 45, we end up with 45.
Take the next digit (8) from the dividend and append it to 45, then repeat: 458 / 66

Let's proceed to step 3:
458 divided by 66 is 6 with a remainder of 62.
Use 6 as the next digit of our solution. 
Result so far: 6.0
If we take 396 away from 458, we end up with 62.
Bring next digit (6) of the dividend behind the 62 and repeat the process: 626 / 66

Going ahead to step 4:
If we divide 626 by 66, we get 9 and a remainder of 32.
The number 9 becomes the next digit in our result. 
Result so far: 69.0
If we subtract 594 from 626, we get 32.
Bring next digit (3) of the dividend behind the 32 and repeat the process: 323 / 66

On to step 5:
If we divide 323 by 66, we get 4 and a remainder of 59.
Put 4 as the next digit of the answer. 
Result so far: 694.0
If we take 264 away from 323, we end up with 59.
Bring next digit (6) of the dividend behind the 59 and repeat the process: 596 / 66

Advancing to step 6:
When dividing 596 by 66, we get 9 with a remainder of 2.
Write down 9 as next digit of the result. 
Result so far: 6949.0
Subtracting 594 from 596 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.

Going ahead to step 7:
20 divided by 66 is 0 with a remainder of 20.
The next digit of our result is 0. 
Result so far: 6949.0
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.

On to step 8:
200 divided by 66 is 3 with a remainder of 2.
Put 3 as the next digit of the answer. 
Result so far: 6949.03
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 9:
When dividing 20 by 66, we get 0 with a remainder of 20.
The next digit of our result is 0. 
Result so far: 6949.03
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.

Going ahead to step 10:
66 goes into 200 3 times with a remainder of 2.
Put 3 as the next digit of the answer. 
Result so far: 6949.0303
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.

Let's proceed to step 11:
The number 66 fits into 20 0 times, leaving a remainder of 20.
Use 0 as the next digit of our solution. 
Result so far: 6949.0303
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.

On to step 12:
When dividing 200 by 66, we get 3 with a remainder of 2.
Record the quotient 3 as the next digit in the result. 
Result so far: 6949.030303
Subtract 198 from 200 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.

Let's proceed to step 13:
The number 66 fits into 20 0 times, leaving a remainder of 20.
Put 0 as the next digit of the answer. 
Result so far: 6949.030303
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.

On to step 14:
If we divide 200 by 66, we get 3 and a remainder of 2.
Use 3 as the next digit of our solution. 
Result so far: 6949.03030303
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.

Our division results in 6949.03030303 with a remaining 2e-09.