685198 divided by 75 
The aim is to understand the frequency of 75 in 685198.

Step 1:
6 divided by 75 is 0 with a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Append the next digit (8) from the dividend to 6 and continue with: 68 / 75

Moving on to step 2:
If we divide 68 by 75, we get 0 and a remainder of 68.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 68 and we're left with 68.
Bring next digit (5) of the dividend behind the 68 and repeat the process: 685 / 75

Going ahead to step 3:
The number 75 fits into 685 9 times, leaving a remainder of 10.
The next digit of our result is 9. 
Result so far: 9.0
Deduct 675 from 685 and we're left with 10.
Take the next digit (1) from the dividend and append it to 10, then repeat: 101 / 75

Moving on to step 4:
75 goes into 101 1 times with a remainder of 26.
The next digit of our result is 1. 
Result so far: 91.0
If we take 75 away from 101, we end up with 26.
Take the next digit (9) from the dividend and append it to 26, then repeat: 269 / 75

Step 5:
75 can be fit into 269 3 times, resulting in a remainder of 44.
The next digit of our result is 3. 
Result so far: 913.0
Subtracting 225 from 269 leaves us with 44.
Take the next digit (8) from the dividend and append it to 44, then repeat: 448 / 75

Let's proceed to step 6:
When dividing 448 by 75, we get 5 with a remainder of 73.
The next digit of our result is 5. 
Result so far: 9135.0
The remainder is 73 after subtracting 375 from 448.
Since there are no more digits in the dividend, we add a zero to the remainder making it 730, and continue the process.

On to step 7:
75 goes into 730 9 times with a remainder of 55.
Record the quotient 9 as the next digit in the result. 
Result so far: 9135.9
Subtract 675 from 730 to get 55.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

Let's proceed to step 8:
If we divide 550 by 75, we get 7 and a remainder of 25.
Use 7 as the next digit of our solution. 
Result so far: 9135.97
Deduct 525 from 550 and we're left with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Step 9:
250 divided by 75 is 3 with a remainder of 25.
Use 3 as the next digit of our solution. 
Result so far: 9135.973
The remainder is 25 after subtracting 225 from 250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Advancing to step 10:
250 divided by 75 is 3 with a remainder of 25.
The number 3 becomes the next digit in our result. 
Result so far: 9135.9733
Subtract 225 from 250 to get 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

After the division, we end up with 9135.9733 and a remainder of 0.00025.