Let's divide 128680 by 7
The aim is to understand the frequency of 7 in 128680.

Going ahead to step 1:
1 divided by 7 is 0 with a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Include the next digit (2) from the dividend after 1, then repeat: 12 / 7

Moving on to step 2:
When dividing 12 by 7, we get 1 with a remainder of 5.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Deduct 7 from 12 and we're left with 5.
Fetch the next digit (8) from the dividend, attach it to 5 and continue: 58 / 7

On to step 3:
If we divide 58 by 7, we get 8 and a remainder of 2.
The next digit of our result is 8. 
Result so far: 18.0
Subtracting 56 from 58 leaves us with 2.
Fetch the next digit (6) from the dividend, attach it to 2 and continue: 26 / 7

Going ahead to step 4:
The number 7 fits into 26 3 times, leaving a remainder of 5.
Write down 3 as next digit of the result. 
Result so far: 183.0
Subtracting 21 from 26 leaves us with 5.
Grab the next digit (8) from the dividend, add it to 5, then carry on: 58 / 7

Advancing to step 5:
The number 7 fits into 58 8 times, leaving a remainder of 2.
Put 8 as the next digit of the answer. 
Result so far: 1838.0
The remainder is 2 after subtracting 56 from 58.
Append the next digit (0) from the dividend to 2 and continue with: 20 / 7

On to step 6:
7 can be fit into 20 2 times, resulting in a remainder of 6.
The next digit of our result is 2. 
Result so far: 18382.0
Deduct 14 from 20 and we're left with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Step 7:
7 can be fit into 60 8 times, resulting in a remainder of 4.
Use 8 as the next digit of our solution. 
Result so far: 18382.8
If we take 56 away from 60, we end up with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Moving on to step 8:
If we divide 40 by 7, we get 5 and a remainder of 5.
Record the quotient 5 as the next digit in the result. 
Result so far: 18382.85
Subtracting 35 from 40 leaves us with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Step 9:
When dividing 50 by 7, we get 7 with a remainder of 1.
Put 7 as the next digit of the answer. 
Result so far: 18382.857
Subtract 49 from 50 to get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Moving on to step 10:
If we divide 10 by 7, we get 1 and a remainder of 3.
The next digit of our result is 1. 
Result so far: 18382.8571
If we subtract 7 from 10, we get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Moving on to step 11:
The number 7 fits into 30 4 times, leaving a remainder of 2.
Put 4 as the next digit of the answer. 
Result so far: 18382.85714
The remainder is 2 after subtracting 28 from 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Step 12:
20 divided by 7 is 2 with a remainder of 6.
Write down 2 as next digit of the result. 
Result so far: 18382.857142
The remainder is 6 after subtracting 14 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Advancing to step 13:
If we divide 60 by 7, we get 8 and a remainder of 4.
Put 8 as the next digit of the answer. 
Result so far: 18382.8571428
Subtracting 56 from 60 leaves us with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Step 14:
The number 7 fits into 40 5 times, leaving a remainder of 5.
The next digit of our result is 5. 
Result so far: 18382.85714285
The remainder is 5 after subtracting 35 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Our division results in 18382.85714285 with a remaining 5e-09.