We look at the division of 391699 by 35 
The aim is to understand the frequency of 35 in 391699.

On to step 1:
If we divide 3 by 35, we get 0 and a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Bring next digit (9) of the dividend behind the 3 and repeat the process: 39 / 35

On to step 2:
The number 35 fits into 39 1 times, leaving a remainder of 4.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we subtract 35 from 39, we get 4.
Fetch the next digit (1) from the dividend, attach it to 4 and continue: 41 / 35

On to step 3:
35 goes into 41 1 times with a remainder of 6.
Use 1 as the next digit of our solution. 
Result so far: 11.0
The remainder is 6 after subtracting 35 from 41.
Append the next digit (6) from the dividend to 6 and continue with: 66 / 35

Let's proceed to step 4:
If we divide 66 by 35, we get 1 and a remainder of 31.
Put 1 as the next digit of the answer. 
Result so far: 111.0
Subtracting 35 from 66 leaves us with 31.
Bring next digit (9) of the dividend behind the 31 and repeat the process: 319 / 35

Advancing to step 5:
35 can be fit into 319 9 times, resulting in a remainder of 4.
Put 9 as the next digit of the answer. 
Result so far: 1119.0
If we subtract 315 from 319, we get 4.
Append the next digit (9) from the dividend to 4 and continue with: 49 / 35

Advancing to step 6:
35 can be fit into 49 1 times, resulting in a remainder of 14.
Record the quotient 1 as the next digit in the result. 
Result so far: 11191.0
Subtract 35 from 49 to get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Step 7:
35 can be fit into 140 4 times, resulting in a remainder of 0.
Record the quotient 4 as the next digit in the result. 
Result so far: 11191.4
Subtract 140 from 140 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 8:
35 can be fit into 0 0 times, resulting in a remainder of 0.
The next digit of our result is 0. 
Result so far: 11191.4
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 9:
When dividing 0 by 35, we get 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 11191.4
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The quotient of the division is 11191.4, and the remainder is 0.0.