We look at the division of 748377 by 66 
The aim is to understand the frequency of 66 in 748377.

Moving on to step 1:
66 can be fit into 7 0 times, resulting in a remainder of 7.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Include the next digit (4) from the dividend after 7, then repeat: 74 / 66

Going ahead to step 2:
66 goes into 74 1 times with a remainder of 8.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Deduct 66 from 74 and we're left with 8.
Bring next digit (8) of the dividend behind the 8 and repeat the process: 88 / 66

On to step 3:
88 divided by 66 is 1 with a remainder of 22.
Record the quotient 1 as the next digit in the result. 
Result so far: 11.0
If we take 66 away from 88, we end up with 22.
Bring next digit (3) of the dividend behind the 22 and repeat the process: 223 / 66

Step 4:
223 divided by 66 is 3 with a remainder of 25.
Record the quotient 3 as the next digit in the result. 
Result so far: 113.0
If we subtract 198 from 223, we get 25.
Include the next digit (7) from the dividend after 25, then repeat: 257 / 66

On to step 5:
257 divided by 66 is 3 with a remainder of 59.
Use 3 as the next digit of our solution. 
Result so far: 1133.0
Subtract 198 from 257 to get 59.
Fetch the next digit (7) from the dividend, attach it to 59 and continue: 597 / 66

Step 6:
66 can be fit into 597 9 times, resulting in a remainder of 3.
The next digit of our result is 9. 
Result so far: 11339.0
Subtracting 594 from 597 leaves us with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Let's proceed to step 7:
66 can be fit into 30 0 times, resulting in a remainder of 30.
Record the quotient 0 as the next digit in the result. 
Result so far: 11339.0
Deduct 0 from 30 and we're left with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Going ahead to step 8:
66 goes into 300 4 times with a remainder of 36.
Write down 4 as next digit of the result. 
Result so far: 11339.04
If we subtract 264 from 300, we get 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Step 9:
66 can be fit into 360 5 times, resulting in a remainder of 30.
The next digit of our result is 5. 
Result so far: 11339.045
If we subtract 330 from 360, we get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Going ahead to step 10:
The number 66 fits into 300 4 times, leaving a remainder of 36.
Record the quotient 4 as the next digit in the result. 
Result so far: 11339.0454
Deduct 264 from 300 and we're left with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Advancing to step 11:
When dividing 360 by 66, we get 5 with a remainder of 30.
Put 5 as the next digit of the answer. 
Result so far: 11339.04545
Deduct 330 from 360 and we're left with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Going ahead to step 12:
When dividing 300 by 66, we get 4 with a remainder of 36.
The number 4 becomes the next digit in our result. 
Result so far: 11339.045454
If we take 264 away from 300, we end up with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

On to step 13:
66 can be fit into 360 5 times, resulting in a remainder of 30.
The next digit of our result is 5. 
Result so far: 11339.0454545
If we subtract 330 from 360, we get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Moving on to step 14:
The number 66 fits into 300 4 times, leaving a remainder of 36.
Put 4 as the next digit of the answer. 
Result so far: 11339.04545454
Deduct 264 from 300 and we're left with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

The final outcome is 11339.04545454, with a leftover of 3.6e-08.