We look at the division of 915569 by 7 
The aim is to understand the frequency of 7 in 915569.

Going ahead to step 1:
The number 7 fits into 9 1 times, leaving a remainder of 2.
Write down 1 as next digit of the result. 
Result so far: 1.0
Deduct 7 from 9 and we're left with 2.
Include the next digit (1) from the dividend after 2, then repeat: 21 / 7

Advancing to step 2:
If we divide 21 by 7, we get 3 and a remainder of 0.
The number 3 becomes the next digit in our result. 
Result so far: 13.0
If we take 21 away from 21, we end up with 0.
Include the next digit (5) from the dividend after 0, then repeat: 5 / 7

Advancing to step 3:
7 can be fit into 5 0 times, resulting in a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 130.0
If we subtract 0 from 5, we get 5.
Append the next digit (5) from the dividend to 5 and continue with: 55 / 7

Advancing to step 4:
The number 7 fits into 55 7 times, leaving a remainder of 6.
Use 7 as the next digit of our solution. 
Result so far: 1307.0
Subtract 49 from 55 to get 6.
Append the next digit (6) from the dividend to 6 and continue with: 66 / 7

Advancing to step 5:
66 divided by 7 is 9 with a remainder of 3.
Use 9 as the next digit of our solution. 
Result so far: 13079.0
Deduct 63 from 66 and we're left with 3.
Grab the next digit (9) from the dividend, add it to 3, then carry on: 39 / 7

On to step 6:
If we divide 39 by 7, we get 5 and a remainder of 4.
Use 5 as the next digit of our solution. 
Result so far: 130795.0
If we subtract 35 from 39, we get 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 7:
7 can be fit into 40 5 times, resulting in a remainder of 5.
The next digit of our result is 5. 
Result so far: 130795.5
If we subtract 35 from 40, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

On to step 8:
7 can be fit into 50 7 times, resulting in a remainder of 1.
The number 7 becomes the next digit in our result. 
Result so far: 130795.57
The remainder is 1 after subtracting 49 from 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

On to step 9:
10 divided by 7 is 1 with a remainder of 3.
The next digit of our result is 1. 
Result so far: 130795.571
Subtract 7 from 10 to 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 10:
30 divided by 7 is 4 with a remainder of 2.
The number 4 becomes the next digit in our result. 
Result so far: 130795.5714
Subtract 28 from 30 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Advancing to step 11:
If we divide 20 by 7, we get 2 and a remainder of 6.
Write down 2 as next digit of the result. 
Result so far: 130795.57142
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.

Let's proceed to step 12:
60 divided by 7 is 8 with a remainder of 4.
The next digit of our result is 8. 
Result so far: 130795.571428
Deduct 56 from 60 and we're left 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.

On to step 13:
The number 7 fits into 40 5 times, leaving a remainder of 5.
The number 5 becomes the next digit in our result. 
Result so far: 130795.5714285
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 14:
When dividing 50 by 7, we get 7 with a remainder of 1.
Write down 7 as next digit of the result. 
Result so far: 130795.57142857
If we subtract 49 from 50, we 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.

The final outcome is 130795.57142857, with a leftover of 1e-09.