We divide 321997 by 75
The aim is to understand the frequency of 75 in 321997.

Let's proceed to step 1:
3 divided by 75 is 0 with a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Grab the next digit (2) from the dividend, add it to 3, then carry on: 32 / 75

On to step 2:
75 goes into 32 0 times with a remainder of 32.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 32, we get 32.
Fetch the next digit (1) from the dividend, attach it to 32 and continue: 321 / 75

Advancing to step 3:
321 divided by 75 is 4 with a remainder of 21.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
Subtracting 300 from 321 leaves us with 21.
Take the next digit (9) from the dividend and append it to 21, then repeat: 219 / 75

Let's proceed to step 4:
75 goes into 219 2 times with a remainder of 69.
Write down 2 as next digit of the result. 
Result so far: 42.0
Subtracting 150 from 219 leaves us with 69.
Take the next digit (9) from the dividend and append it to 69, then repeat: 699 / 75

Going ahead to step 5:
When dividing 699 by 75, we get 9 with a remainder of 24.
Write down 9 as next digit of the result. 
Result so far: 429.0
Deduct 675 from 699 and we're left with 24.
Take the next digit (7) from the dividend and append it to 24, then repeat: 247 / 75

On to step 6:
75 goes into 247 3 times with a remainder of 22.
The next digit of our result is 3. 
Result so far: 4293.0
Subtract 225 from 247 to get 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Going ahead to step 7:
The number 75 fits into 220 2 times, leaving a remainder of 70.
The next digit of our result is 2. 
Result so far: 4293.2
Subtracting 150 from 220 leaves us with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Step 8:
700 divided by 75 is 9 with a remainder of 25.
Record the quotient 9 as the next digit in the result. 
Result so far: 4293.29
Deduct 675 from 700 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:
If we divide 250 by 75, we get 3 and a remainder of 25.
The next digit of our result is 3. 
Result so far: 4293.293
Subtracting 225 from 250 leaves us 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.

On to step 10:
250 divided by 75 is 3 with a remainder of 25.
Use 3 as the next digit of our solution. 
Result so far: 4293.2933
Subtracting 225 from 250 leaves us 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.

The final result is 4293.2933 with a remainder of 0.00025.