We're dividing 16706649 by 7 
The aim is to understand the frequency of 7 in 16706649.

Step 1:
If we divide 1 by 7, we get 0 and a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Include the next digit (6) from the dividend after 1, then repeat: 16 / 7

Going ahead to step 2:
16 divided by 7 is 2 with a remainder of 2.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
Subtract 14 from 16 to get 2.
Fetch the next digit (7) from the dividend, attach it to 2 and continue: 27 / 7

Let's proceed to step 3:
The number 7 fits into 27 3 times, leaving a remainder of 6.
The number 3 becomes the next digit in our result. 
Result so far: 23.0
If we take 21 away from 27, we end up with 6.
Fetch the next digit (0) from the dividend, attach it to 6 and continue: 60 / 7

Advancing to step 4:
7 goes into 60 8 times with a remainder of 4.
The next digit of our result is 8. 
Result so far: 238.0
If we take 56 away from 60, we end up with 4.
Include the next digit (6) from the dividend after 4, then repeat: 46 / 7

On to step 5:
If we divide 46 by 7, we get 6 and a remainder of 4.
The number 6 becomes the next digit in our result. 
Result so far: 2386.0
Deduct 42 from 46 and we're left with 4.
Append the next digit (6) from the dividend to 4 and continue with: 46 / 7

Moving on to step 6:
If we divide 46 by 7, we get 6 and a remainder of 4.
Write down 6 as next digit of the result. 
Result so far: 23866.0
Deduct 42 from 46 and we're left with 4.
Bring next digit (4) of the dividend behind the 4 and repeat the process: 44 / 7

Let's proceed to step 7:
44 divided by 7 is 6 with a remainder of 2.
The next digit of our result is 6. 
Result so far: 238666.0
The remainder is 2 after subtracting 42 from 44.
Fetch the next digit (9) from the dividend, attach it to 2 and continue: 29 / 7

On to step 8:
If we divide 29 by 7, we get 4 and a remainder of 1.
Write down 4 as next digit of the result. 
Result so far: 2386664.0
Subtract 28 from 29 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.

Let's proceed to step 9:
7 goes into 10 1 times with a remainder of 3.
The number 1 becomes the next digit in our result. 
Result so far: 2386664.1
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 10:
7 goes into 30 4 times with a remainder of 2.
Record the quotient 4 as the next digit in the result. 
Result so far: 2386664.14
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:
7 can be fit into 20 2 times, resulting in a remainder of 6.
Write down 2 as next digit of the result. 
Result so far: 2386664.142
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.

Advancing to step 12:
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: 2386664.1428
The remainder is 4 after subtracting 56 from 60.
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 13:
When dividing 40 by 7, we get 5 with a remainder of 5.
The number 5 becomes the next digit in our result. 
Result so far: 2386664.14285
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.

On to step 14:
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: 2386664.142857
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 15:
When dividing 10 by 7, we get 1 with a remainder of 3.
Record the quotient 1 as the next digit in the result. 
Result so far: 2386664.1428571
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.

On to step 16:
7 goes into 30 4 times with a remainder of 2.
The number 4 becomes the next digit in our result. 
Result so far: 2386664.14285714
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.

After the division, we end up with 2386664.14285714 and a remainder of 2e-09.