We look at the division of 808524 by 7 
The aim is to understand the frequency of 7 in 808524.

Step 1:
The number 7 fits into 8 1 times, leaving a remainder of 1.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we take 7 away from 8, we end up with 1.
Bring next digit (0) of the dividend behind the 1 and repeat the process: 10 / 7

Going ahead to step 2:
10 divided by 7 is 1 with a remainder of 3.
The number 1 becomes the next digit in our result. 
Result so far: 11.0
Deduct 7 from 10 and we're left with 3.
Bring next digit (8) of the dividend behind the 3 and repeat the process: 38 / 7

Moving on to step 3:
When dividing 38 by 7, we get 5 with a remainder of 3.
The number 5 becomes the next digit in our result. 
Result so far: 115.0
If we take 35 away from 38, we end up with 3.
Grab the next digit (5) from the dividend, add it to 3, then carry on: 35 / 7

Going ahead to step 4:
When dividing 35 by 7, we get 5 with a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 1155.0
If we take 35 away from 35, we end up with 0.
Grab the next digit (2) from the dividend, add it to 0, then carry on: 2 / 7

Moving on to step 5:
7 can be fit into 2 0 times, resulting in a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 11550.0
If we take 0 away from 2, we end up with 2.
Grab the next digit (4) from the dividend, add it to 2, then carry on: 24 / 7

Let's proceed to step 6:
When dividing 24 by 7, we get 3 with a remainder of 3.
Record the quotient 3 as the next digit in the result. 
Result so far: 115503.0
Subtracting 21 from 24 leaves us 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.

Step 7:
30 divided by 7 is 4 with a remainder of 2.
Use 4 as the next digit of our solution. 
Result so far: 115503.4
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.

Going ahead to step 8:
When dividing 20 by 7, we get 2 with a remainder of 6.
Use 2 as the next digit of our solution. 
Result so far: 115503.42
If we take 14 away from 20, we end up 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.

Advancing to step 9:
60 divided by 7 is 8 with a remainder of 4.
The number 8 becomes the next digit in our result. 
Result so far: 115503.428
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 10:
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: 115503.4285
Subtract 35 from 40 to 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.

Moving on to step 11:
The number 7 fits into 50 7 times, leaving a remainder of 1.
Write down 7 as next digit of the result. 
Result so far: 115503.42857
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 12:
10 divided by 7 is 1 with a remainder of 3.
Use 1 as the next digit of our solution. 
Result so far: 115503.428571
The remainder is 3 after subtracting 7 from 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Let's proceed to step 13:
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: 115503.4285714
Subtracting 28 from 30 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

On to step 14:
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: 115503.42857142
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.

After the division, we end up with 115503.42857142 and a remainder of 6e-09.