We're dividing 13976828 by 666 
The aim is to understand the frequency of 666 in 13976828.

Moving on to step 1:
666 goes into 1 0 times with a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Take the next digit (3) from the dividend and append it to 1, then repeat: 13 / 666

Moving on to step 2:
666 can be fit into 13 0 times, resulting in a remainder of 13.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 13, we end up with 13.
Grab the next digit (9) from the dividend, add it to 13, then carry on: 139 / 666

On to step 3:
The number 666 fits into 139 0 times, leaving a remainder of 139.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 139 after subtracting 0 from 139.
Append the next digit (7) from the dividend to 139 and continue with: 1397 / 666

Advancing to step 4:
1397 divided by 666 is 2 with a remainder of 65.
Write down 2 as next digit of the result. 
Result so far: 2.0
If we subtract 1332 from 1397, we get 65.
Take the next digit (6) from the dividend and append it to 65, then repeat: 656 / 666

Going ahead to step 5:
The number 666 fits into 656 0 times, leaving a remainder of 656.
Record the quotient 0 as the next digit in the result. 
Result so far: 20.0
Deduct 0 from 656 and we're left with 656.
Fetch the next digit (8) from the dividend, attach it to 656 and continue: 6568 / 666

On to step 6:
When dividing 6568 by 666, we get 9 with a remainder of 574.
Use 9 as the next digit of our solution. 
Result so far: 209.0
The remainder is 574 after subtracting 5994 from 6568.
Grab the next digit (2) from the dividend, add it to 574, then carry on: 5742 / 666

On to step 7:
666 can be fit into 5742 8 times, resulting in a remainder of 414.
Put 8 as the next digit of the answer. 
Result so far: 2098.0
If we take 5328 away from 5742, we end up with 414.
Append the next digit (8) from the dividend to 414 and continue with: 4148 / 666

On to step 8:
If we divide 4148 by 666, we get 6 and a remainder of 152.
The next digit of our result is 6. 
Result so far: 20986.0
If we take 3996 away from 4148, we end up with 152.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1520, and continue the process.

Advancing to step 9:
When dividing 1520 by 666, we get 2 with a remainder of 188.
Record the quotient 2 as the next digit in the result. 
Result so far: 20986.2
If we take 1332 away from 1520, we end up with 188.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1880, and continue the process.

Moving on to step 10:
1880 divided by 666 is 2 with a remainder of 548.
Record the quotient 2 as the next digit in the result. 
Result so far: 20986.22
Deduct 1332 from 1880 and we're left with 548.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5480, and continue the process.

The final result is 20986.22 with a remainder of 0.548.