592890 ÷ 66 
The aim is to understand the frequency of 66 in 592890.

Advancing to step 1:
If we divide 5 by 66, we get 0 and a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Append the next digit (9) from the dividend to 5 and continue with: 59 / 66

Step 2:
66 goes into 59 0 times with a remainder of 59.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 59 and we're left with 59.
Grab the next digit (2) from the dividend, add it to 59, then carry on: 592 / 66

Let's proceed to step 3:
If we divide 592 by 66, we get 8 and a remainder of 64.
Record the quotient 8 as the next digit in the result. 
Result so far: 8.0
Subtracting 528 from 592 leaves us with 64.
Include the next digit (8) from the dividend after 64, then repeat: 648 / 66

Advancing to step 4:
When dividing 648 by 66, we get 9 with a remainder of 54.
Record the quotient 9 as the next digit in the result. 
Result so far: 89.0
Subtracting 594 from 648 leaves us with 54.
Append the next digit (9) from the dividend to 54 and continue with: 549 / 66

Let's proceed to step 5:
If we divide 549 by 66, we get 8 and a remainder of 21.
Use 8 as the next digit of our solution. 
Result so far: 898.0
If we subtract 528 from 549, we get 21.
Take the next digit (0) from the dividend and append it to 21, then repeat: 210 / 66

Going ahead to step 6:
The number 66 fits into 210 3 times, leaving a remainder of 12.
Record the quotient 3 as the next digit in the result. 
Result so far: 8983.0
Subtract 198 from 210 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Moving on to step 7:
When dividing 120 by 66, we get 1 with a remainder of 54.
Put 1 as the next digit of the answer. 
Result so far: 8983.1
Deduct 66 from 120 and we're left with 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Advancing to step 8:
540 divided by 66 is 8 with a remainder of 12.
Write down 8 as next digit of the result. 
Result so far: 8983.18
Subtracting 528 from 540 leaves us with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Moving on to step 9:
The number 66 fits into 120 1 times, leaving a remainder of 54.
Put 1 as the next digit of the answer. 
Result so far: 8983.181
If we subtract 66 from 120, we get 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Moving on to step 10:
When dividing 540 by 66, we get 8 with a remainder of 12.
Record the quotient 8 as the next digit in the result. 
Result so far: 8983.1818
The remainder is 12 after subtracting 528 from 540.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Going ahead to step 11:
When dividing 120 by 66, we get 1 with a remainder of 54.
The number 1 becomes the next digit in our result. 
Result so far: 8983.18181
Subtract 66 from 120 to get 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

On to step 12:
If we divide 540 by 66, we get 8 and a remainder of 12.
Put 8 as the next digit of the answer. 
Result so far: 8983.181818
If we take 528 away from 540, we end up with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

On to step 13:
The number 66 fits into 120 1 times, leaving a remainder of 54.
Use 1 as the next digit of our solution. 
Result so far: 8983.1818181
Deduct 66 from 120 and we're left with 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

On to step 14:
If we divide 540 by 66, we get 8 and a remainder of 12.
Put 8 as the next digit of the answer. 
Result so far: 8983.18181818
Subtracting 528 from 540 leaves us with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Our division results in 8983.18181818 with a remaining 1.2e-08.