999403 ÷ 7 
The aim is to understand the frequency of 7 in 999403.

Advancing to step 1:
If we divide 9 by 7, we get 1 and a remainder of 2.
The next digit of our result is 1. 
Result so far: 1.0
If we take 7 away from 9, we end up with 2.
Take the next digit (9) from the dividend and append it to 2, then repeat: 29 / 7

Step 2:
7 goes into 29 4 times with a remainder of 1.
The number 4 becomes the next digit in our result. 
Result so far: 14.0
The remainder is 1 after subtracting 28 from 29.
Append the next digit (9) from the dividend to 1 and continue with: 19 / 7

Let's proceed to step 3:
If we divide 19 by 7, we get 2 and a remainder of 5.
Write down 2 as next digit of the result. 
Result so far: 142.0
Subtract 14 from 19 to get 5.
Bring next digit (4) of the dividend behind the 5 and repeat the process: 54 / 7

Step 4:
54 divided by 7 is 7 with a remainder of 5.
Use 7 as the next digit of our solution. 
Result so far: 1427.0
The remainder is 5 after subtracting 49 from 54.
Include the next digit (0) from the dividend after 5, then repeat: 50 / 7

Going ahead to step 5:
The number 7 fits into 50 7 times, leaving a remainder of 1.
The next digit of our result is 7. 
Result so far: 14277.0
Subtracting 49 from 50 leaves us with 1.
Bring next digit (3) of the dividend behind the 1 and repeat the process: 13 / 7

Advancing to step 6:
13 divided by 7 is 1 with a remainder of 6.
Write down 1 as next digit of the result. 
Result so far: 142771.0
The remainder is 6 after subtracting 7 from 13.
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 7:
7 goes into 60 8 times with a remainder of 4.
The next digit of our result is 8. 
Result so far: 142771.8
If we subtract 56 from 60, 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.

Advancing to step 8:
If we divide 40 by 7, we get 5 and a remainder of 5.
The next digit of our result is 5. 
Result so far: 142771.85
Deduct 35 from 40 and we're left 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:
50 divided by 7 is 7 with a remainder of 1.
The number 7 becomes the next digit in our result. 
Result so far: 142771.857
Subtracting 49 from 50 leaves us with 1.
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 10:
7 can be fit into 10 1 times, resulting in a remainder of 3.
Put 1 as the next digit of the answer. 
Result so far: 142771.8571
If we take 7 away from 10, we end up with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

On to step 11:
If we divide 30 by 7, we get 4 and a remainder of 2.
The next digit of our result is 4. 
Result so far: 142771.85714
If we subtract 28 from 30, we 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.

Going ahead to step 12:
20 divided by 7 is 2 with a remainder of 6.
Record the quotient 2 as the next digit in the result. 
Result so far: 142771.857142
Subtract 14 from 20 to get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

On 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: 142771.8571428
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.

Advancing to step 14:
40 divided by 7 is 5 with a remainder of 5.
Record the quotient 5 as the next digit in the result. 
Result so far: 142771.85714285
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.

In conclusion, the division gives 142771.85714285 with a balance of 5e-09.