129913 ÷ 7 
The aim is to understand the frequency of 7 in 129913.

Let's proceed to step 1:
If we divide 1 by 7, we get 0 and 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.
Include the next digit (2) from the dividend after 1, then repeat: 12 / 7

On to step 2:
7 goes into 12 1 times with a remainder of 5.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtract 7 from 12 to get 5.
Include the next digit (9) from the dividend after 5, then repeat: 59 / 7

Let's proceed to step 3:
59 divided by 7 is 8 with a remainder of 3.
Put 8 as the next digit of the answer. 
Result so far: 18.0
Subtracting 56 from 59 leaves us with 3.
Bring next digit (9) of the dividend behind the 3 and repeat the process: 39 / 7

Let's proceed to step 4:
7 can be fit into 39 5 times, resulting in a remainder of 4.
Use 5 as the next digit of our solution. 
Result so far: 185.0
Subtract 35 from 39 to get 4.
Append the next digit (1) from the dividend to 4 and continue with: 41 / 7

Advancing to step 5:
41 divided by 7 is 5 with a remainder of 6.
The number 5 becomes the next digit in our result. 
Result so far: 1855.0
Subtracting 35 from 41 leaves us with 6.
Grab the next digit (3) from the dividend, add it to 6, then carry on: 63 / 7

Going ahead to step 6:
When dividing 63 by 7, we get 9 with a remainder of 0.
The next digit of our result is 9. 
Result so far: 18559.0
The remainder is 0 after subtracting 63 from 63.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 7:
When dividing 0 by 7, we get 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 18559.0
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 8:
0 divided by 7 is 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 18559.0
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

In conclusion, the division gives 18559.0 with a balance of 0.0.