We're dividing 778623 by 66 
The aim is to understand the frequency of 66 in 778623.

Going ahead to step 1:
66 goes into 7 0 times with 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.
Grab the next digit (7) from the dividend, add it to 7, then carry on: 77 / 66

On to step 2:
When dividing 77 by 66, we get 1 with a remainder of 11.
The next digit of our result is 1. 
Result so far: 1.0
The remainder is 11 after subtracting 66 from 77.
Bring next digit (8) of the dividend behind the 11 and repeat the process: 118 / 66

On to step 3:
66 can be fit into 118 1 times, resulting in a remainder of 52.
The number 1 becomes the next digit in our result. 
Result so far: 11.0
Subtract 66 from 118 to get 52.
Take the next digit (6) from the dividend and append it to 52, then repeat: 526 / 66

On to step 4:
When dividing 526 by 66, we get 7 with a remainder of 64.
Use 7 as the next digit of our solution. 
Result so far: 117.0
The remainder is 64 after subtracting 462 from 526.
Append the next digit (2) from the dividend to 64 and continue with: 642 / 66

Moving on to step 5:
When dividing 642 by 66, we get 9 with a remainder of 48.
The number 9 becomes the next digit in our result. 
Result so far: 1179.0
If we take 594 away from 642, we end up with 48.
Grab the next digit (3) from the dividend, add it to 48, then carry on: 483 / 66

Step 6:
66 goes into 483 7 times with a remainder of 21.
Record the quotient 7 as the next digit in the result. 
Result so far: 11797.0
Deduct 462 from 483 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:
66 goes into 210 3 times with a remainder of 12.
The next digit of our result is 3. 
Result so far: 11797.3
Deduct 198 from 210 and we're left 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 8:
120 divided by 66 is 1 with a remainder of 54.
Record the quotient 1 as the next digit in the result. 
Result so far: 11797.31
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.

Moving 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: 11797.318
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:
The number 66 fits into 120 1 times, leaving a remainder of 54.
The number 1 becomes the next digit in our result. 
Result so far: 11797.3181
Subtracting 66 from 120 leaves us 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 11:
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: 11797.31818
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.

Advancing to step 12:
66 goes into 120 1 times with a remainder of 54.
Put 1 as the next digit of the answer. 
Result so far: 11797.318181
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 13:
If we divide 540 by 66, we get 8 and a remainder of 12.
Record the quotient 8 as the next digit in the result. 
Result so far: 11797.3181818
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.

Moving on to step 14:
66 can be fit into 120 1 times, resulting in a remainder of 54.
Use 1 as the next digit of our solution. 
Result so far: 11797.31818181
Subtracting 66 from 120 leaves us 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.

In conclusion, the division gives 11797.31818181 with a balance of 5.4e-08.