We're dividing 745359 by 66 
The aim is to understand the frequency of 66 in 745359.

Step 1:
The number 66 fits into 7 0 times, leaving a remainder of 7.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Append the next digit (4) from the dividend to 7 and continue with: 74 / 66

Going ahead to step 2:
If we divide 74 by 66, we get 1 and a remainder of 8.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Deduct 66 from 74 and we're left with 8.
Grab the next digit (5) from the dividend, add it to 8, then carry on: 85 / 66

On to step 3:
The number 66 fits into 85 1 times, leaving a remainder of 19.
Record the quotient 1 as the next digit in the result. 
Result so far: 11.0
Subtracting 66 from 85 leaves us with 19.
Append the next digit (3) from the dividend to 19 and continue with: 193 / 66

On to step 4:
66 goes into 193 2 times with a remainder of 61.
The next digit of our result is 2. 
Result so far: 112.0
If we take 132 away from 193, we end up with 61.
Include the next digit (5) from the dividend after 61, then repeat: 615 / 66

Going ahead to step 5:
The number 66 fits into 615 9 times, leaving a remainder of 21.
The number 9 becomes the next digit in our result. 
Result so far: 1129.0
Subtract 594 from 615 to get 21.
Include the next digit (9) from the dividend after 21, then repeat: 219 / 66

Moving on to step 6:
66 can be fit into 219 3 times, resulting in a remainder of 21.
The number 3 becomes the next digit in our result. 
Result so far: 11293.0
Deduct 198 from 219 and we're left with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Going ahead to step 7:
The number 66 fits into 210 3 times, leaving a remainder of 12.
Write down 3 as next digit of the result. 
Result so far: 11293.3
The remainder is 12 after subtracting 198 from 210.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Advancing to step 8:
The number 66 fits into 120 1 times, leaving a remainder of 54.
The next digit of our result is 1. 
Result so far: 11293.31
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 9:
66 goes into 540 8 times with a remainder of 12.
Use 8 as the next digit of our solution. 
Result so far: 11293.318
Subtract 528 from 540 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.

On to step 10:
If we divide 120 by 66, we get 1 and a remainder of 54.
Record the quotient 1 as the next digit in the result. 
Result so far: 11293.3181
The remainder is 54 after subtracting 66 from 120.
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 11:
540 divided by 66 is 8 with a remainder of 12.
Use 8 as the next digit of our solution. 
Result so far: 11293.31818
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.

Let's proceed to step 12:
The number 66 fits into 120 1 times, leaving a remainder of 54.
Record the quotient 1 as the next digit in the result. 
Result so far: 11293.318181
The remainder is 54 after subtracting 66 from 120.
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 13:
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: 11293.3181818
Subtract 528 from 540 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.

Step 14:
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: 11293.31818181
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.

In conclusion, the division gives 11293.31818181 with a balance of 5.4e-08.