784391 divided by 7 
The aim is to understand the frequency of 7 in 784391.

Moving on to step 1:
7 divided by 7 is 1 with a remainder of 0.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Deduct 7 from 7 and we're left with 0.
Take the next digit (8) from the dividend and append it to 0, then repeat: 8 / 7

On to step 2:
8 divided by 7 is 1 with a remainder of 1.
Record the quotient 1 as the next digit in the result. 
Result so far: 11.0
If we subtract 7 from 8, we get 1.
Append the next digit (4) from the dividend to 1 and continue with: 14 / 7

Let's proceed to step 3:
If we divide 14 by 7, we get 2 and a remainder of 0.
The number 2 becomes the next digit in our result. 
Result so far: 112.0
Subtracting 14 from 14 leaves us with 0.
Append the next digit (3) from the dividend to 0 and continue with: 3 / 7

Step 4:
When dividing 3 by 7, we get 0 with a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 1120.0
Subtracting 0 from 3 leaves us with 3.
Append the next digit (9) from the dividend to 3 and continue with: 39 / 7

On to step 5:
The number 7 fits into 39 5 times, leaving a remainder of 4.
Use 5 as the next digit of our solution. 
Result so far: 11205.0
Deduct 35 from 39 and we're left with 4.
Bring next digit (1) of the dividend behind the 4 and repeat the process: 41 / 7

Advancing to step 6:
7 goes into 41 5 times with a remainder of 6.
Use 5 as the next digit of our solution. 
Result so far: 112055.0
Subtracting 35 from 41 leaves us 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 7:
When dividing 60 by 7, we get 8 with a remainder of 4.
The next digit of our result is 8. 
Result so far: 112055.8
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.

On to step 8:
The number 7 fits into 40 5 times, leaving a remainder of 5.
Use 5 as the next digit of our solution. 
Result so far: 112055.85
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.

Let's proceed to step 9:
50 divided by 7 is 7 with a remainder of 1.
Put 7 as the next digit of the answer. 
Result so far: 112055.857
If we take 49 away from 50, we end up 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:
If we divide 10 by 7, we get 1 and a remainder of 3.
Use 1 as the next digit of our solution. 
Result so far: 112055.8571
Deduct 7 from 10 and we're left 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.

Moving on to step 11:
7 can be fit into 30 4 times, resulting in a remainder of 2.
The next digit of our result is 4. 
Result so far: 112055.85714
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.

On to step 12:
The number 7 fits into 20 2 times, leaving a remainder of 6.
Record the quotient 2 as the next digit in the result. 
Result so far: 112055.857142
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 13:
If we divide 60 by 7, we get 8 and a remainder of 4.
Write down 8 as next digit of the result. 
Result so far: 112055.8571428
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.

Moving on to step 14:
7 can be fit into 40 5 times, resulting in a remainder of 5.
Record the quotient 5 as the next digit in the result. 
Result so far: 112055.85714285
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.

The final outcome is 112055.85714285, with a leftover of 5e-09.