We look at the division of 690751 by 7 
The aim is to understand the frequency of 7 in 690751.

Going ahead to step 1:
The number 7 fits into 6 0 times, leaving a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Grab the next digit (9) from the dividend, add it to 6, then carry on: 69 / 7

Advancing to step 2:
If we divide 69 by 7, we get 9 and a remainder of 6.
Write down 9 as next digit of the result. 
Result so far: 9.0
If we subtract 63 from 69, we get 6.
Bring next digit (0) of the dividend behind the 6 and repeat the process: 60 / 7

Step 3:
If we divide 60 by 7, we get 8 and a remainder of 4.
Put 8 as the next digit of the answer. 
Result so far: 98.0
If we subtract 56 from 60, we get 4.
Bring next digit (7) of the dividend behind the 4 and repeat the process: 47 / 7

Advancing to step 4:
7 goes into 47 6 times with a remainder of 5.
Write down 6 as next digit of the result. 
Result so far: 986.0
Subtracting 42 from 47 leaves us with 5.
Append the next digit (5) from the dividend to 5 and continue with: 55 / 7

Let's proceed to step 5:
The number 7 fits into 55 7 times, leaving a remainder of 6.
Put 7 as the next digit of the answer. 
Result so far: 9867.0
If we subtract 49 from 55, we get 6.
Fetch the next digit (1) from the dividend, attach it to 6 and continue: 61 / 7

Going ahead to step 6:
If we divide 61 by 7, we get 8 and a remainder of 5.
Write down 8 as next digit of the result. 
Result so far: 98678.0
Deduct 56 from 61 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 7:
The number 7 fits into 50 7 times, leaving a remainder of 1.
Use 7 as the next digit of our solution. 
Result so far: 98678.7
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.

Advancing to step 8:
7 goes into 10 1 times with a remainder of 3.
Use 1 as the next digit of our solution. 
Result so far: 98678.71
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.

On to step 9:
When dividing 30 by 7, we get 4 with a remainder of 2.
The next digit of our result is 4. 
Result so far: 98678.714
If we take 28 away from 30, we end up 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 10:
If we divide 20 by 7, we get 2 and a remainder of 6.
The number 2 becomes the next digit in our result. 
Result so far: 98678.7142
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.

Let's proceed to step 11:
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: 98678.71428
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.

On to step 12:
When dividing 40 by 7, we get 5 with a remainder of 5.
Record the quotient 5 as the next digit in the result. 
Result so far: 98678.714285
If we subtract 35 from 40, we 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.

Advancing to step 13:
7 goes into 50 7 times with a remainder of 1.
The number 7 becomes the next digit in our result. 
Result so far: 98678.7142857
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.

Step 14:
10 divided by 7 is 1 with a remainder of 3.
Use 1 as the next digit of our solution. 
Result so far: 98678.71428571
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.

In conclusion, the division gives 98678.71428571 with a balance of 3e-09.