813808 divided by 7 
The aim is to understand the frequency of 7 in 813808.

Let's proceed to step 1:
The number 7 fits into 8 1 times, leaving a remainder of 1.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Deduct 7 from 8 and we're left with 1.
Grab the next digit (1) from the dividend, add it to 1, then carry on: 11 / 7

Advancing to step 2:
When dividing 11 by 7, we get 1 with a remainder of 4.
Put 1 as the next digit of the answer. 
Result so far: 11.0
If we subtract 7 from 11, we get 4.
Fetch the next digit (3) from the dividend, attach it to 4 and continue: 43 / 7

Let's proceed to step 3:
7 goes into 43 6 times with a remainder of 1.
The next digit of our result is 6. 
Result so far: 116.0
If we take 42 away from 43, we end up with 1.
Append the next digit (8) from the dividend to 1 and continue with: 18 / 7

Let's proceed to step 4:
7 can be fit into 18 2 times, resulting in a remainder of 4.
The next digit of our result is 2. 
Result so far: 1162.0
Deduct 14 from 18 and we're left with 4.
Append the next digit (0) from the dividend to 4 and continue with: 40 / 7

Moving on to step 5:
40 divided by 7 is 5 with a remainder of 5.
Write down 5 as next digit of the result. 
Result so far: 11625.0
Subtract 35 from 40 to get 5.
Bring next digit (8) of the dividend behind the 5 and repeat the process: 58 / 7

Let's proceed to step 6:
When dividing 58 by 7, we get 8 with a remainder of 2.
Record the quotient 8 as the next digit in the result. 
Result so far: 116258.0
Subtracting 56 from 58 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.

Let's proceed to step 7:
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: 116258.2
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.

Step 8:
The number 7 fits into 60 8 times, leaving a remainder of 4.
The number 8 becomes the next digit in our result. 
Result so far: 116258.28
Subtract 56 from 60 to 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.

Let's proceed to step 9:
7 goes into 40 5 times with a remainder of 5.
Put 5 as the next digit of the answer. 
Result so far: 116258.285
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.

Moving on to step 10:
50 divided by 7 is 7 with a remainder of 1.
Write down 7 as next digit of the result. 
Result so far: 116258.2857
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.

Step 11:
7 goes into 10 1 times with a remainder of 3.
Put 1 as the next digit of the answer. 
Result so far: 116258.28571
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.

Advancing to step 12:
When dividing 30 by 7, we get 4 with a remainder of 2.
Record the quotient 4 as the next digit in the result. 
Result so far: 116258.285714
Deduct 28 from 30 and we're left 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.

Moving on to step 13:
7 goes into 20 2 times with a remainder of 6.
Put 2 as the next digit of the answer. 
Result so far: 116258.2857142
If we subtract 14 from 20, we 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.

Step 14:
7 goes into 60 8 times with a remainder of 4.
Write down 8 as next digit of the result. 
Result so far: 116258.28571428
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.

Our division results in 116258.28571428 with a remaining 4e-09.