839079 divided by 66 
The aim is to understand the frequency of 66 in 839079.

Moving on to step 1:
66 goes into 8 0 times with a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Grab the next digit (3) from the dividend, add it to 8, then carry on: 83 / 66

Step 2:
If we divide 83 by 66, we get 1 and a remainder of 17.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we subtract 66 from 83, we get 17.
Fetch the next digit (9) from the dividend, attach it to 17 and continue: 179 / 66

On to step 3:
When dividing 179 by 66, we get 2 with a remainder of 47.
Put 2 as the next digit of the answer. 
Result so far: 12.0
Deduct 132 from 179 and we're left with 47.
Bring next digit (0) of the dividend behind the 47 and repeat the process: 470 / 66

Step 4:
66 can be fit into 470 7 times, resulting in a remainder of 8.
Use 7 as the next digit of our solution. 
Result so far: 127.0
Deduct 462 from 470 and we're left with 8.
Bring next digit (7) of the dividend behind the 8 and repeat the process: 87 / 66

Advancing to step 5:
If we divide 87 by 66, we get 1 and a remainder of 21.
The number 1 becomes the next digit in our result. 
Result so far: 1271.0
Subtracting 66 from 87 leaves us with 21.
Grab the next digit (9) from the dividend, add it to 21, then carry on: 219 / 66

Advancing to step 6:
66 can be fit into 219 3 times, resulting in a remainder of 21.
Record the quotient 3 as the next digit in the result. 
Result so far: 12713.0
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.

On to step 7:
66 can be fit into 210 3 times, resulting in a remainder of 12.
Record the quotient 3 as the next digit in the result. 
Result so far: 12713.3
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.

Moving on to step 8:
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: 12713.31
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:
540 divided by 66 is 8 with a remainder of 12.
Write down 8 as next digit of the result. 
Result so far: 12713.318
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.

Advancing to step 10:
66 goes into 120 1 times with a remainder of 54.
The next digit of our result is 1. 
Result so far: 12713.3181
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.

Going ahead to step 11:
The number 66 fits into 540 8 times, leaving a remainder of 12.
Record the quotient 8 as the next digit in the result. 
Result so far: 12713.31818
Deduct 528 from 540 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.

Advancing to step 12:
If we divide 120 by 66, we get 1 and a remainder of 54.
Write down 1 as next digit of the result. 
Result so far: 12713.318181
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.

Let's proceed to step 13:
540 divided by 66 is 8 with a remainder of 12.
The number 8 becomes the next digit in our result. 
Result so far: 12713.3181818
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.

Step 14:
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: 12713.31818181
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.

Our division results in 12713.31818181 with a remaining 5.4e-08.