612931 ÷ 7 
The aim is to understand the frequency of 7 in 612931.

Going ahead to step 1:
When dividing 6 by 7, we get 0 with a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Fetch the next digit (1) from the dividend, attach it to 6 and continue: 61 / 7

Moving on to step 2:
If we divide 61 by 7, we get 8 and a remainder of 5.
Record the quotient 8 as the next digit in the result. 
Result so far: 8.0
If we take 56 away from 61, we end up with 5.
Include the next digit (2) from the dividend after 5, then repeat: 52 / 7

Going ahead to step 3:
The number 7 fits into 52 7 times, leaving a remainder of 3.
Put 7 as the next digit of the answer. 
Result so far: 87.0
Subtract 49 from 52 to get 3.
Fetch the next digit (9) from the dividend, attach it to 3 and continue: 39 / 7

Let's proceed to step 4:
If we divide 39 by 7, we get 5 and a remainder of 4.
Write down 5 as next digit of the result. 
Result so far: 875.0
If we subtract 35 from 39, we get 4.
Include the next digit (3) from the dividend after 4, then repeat: 43 / 7

Moving on to step 5:
If we divide 43 by 7, we get 6 and a remainder of 1.
The next digit of our result is 6. 
Result so far: 8756.0
If we take 42 away from 43, we end up with 1.
Bring next digit (1) of the dividend behind the 1 and repeat the process: 11 / 7

Advancing to step 6:
If we divide 11 by 7, we get 1 and a remainder of 4.
Put 1 as the next digit of the answer. 
Result so far: 87561.0
Deduct 7 from 11 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.

Step 7:
The number 7 fits into 40 5 times, leaving a remainder of 5.
Write down 5 as next digit of the result. 
Result so far: 87561.5
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.

Step 8:
If we divide 50 by 7, we get 7 and a remainder of 1.
Put 7 as the next digit of the answer. 
Result so far: 87561.57
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.

Let's proceed to step 9:
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: 87561.571
Subtracting 7 from 10 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.

On to step 10:
7 can be fit into 30 4 times, resulting in a remainder of 2.
Write down 4 as next digit of the result. 
Result so far: 87561.5714
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 11:
The number 7 fits into 20 2 times, leaving a remainder of 6.
Use 2 as the next digit of our solution. 
Result so far: 87561.57142
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.

Let's proceed to step 12:
The number 7 fits into 60 8 times, leaving a remainder of 4.
Use 8 as the next digit of our solution. 
Result so far: 87561.571428
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.

Step 13:
7 goes into 40 5 times with a remainder of 5.
Put 5 as the next digit of the answer. 
Result so far: 87561.5714285
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.

Advancing to step 14:
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: 87561.57142857
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 result is 87561.57142857 with a remainder of 1e-09.