91452519 ÷ 397 
The aim is to understand the frequency of 397 in 91452519.

Step 1:
The number 397 fits into 9 0 times, leaving a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Include the next digit (1) from the dividend after 9, then repeat: 91 / 397

Advancing to step 2:
When dividing 91 by 397, we get 0 with a remainder of 91.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 91 and we're left with 91.
Grab the next digit (4) from the dividend, add it to 91, then carry on: 914 / 397

Moving on to step 3:
If we divide 914 by 397, we get 2 and a remainder of 120.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
If we take 794 away from 914, we end up with 120.
Take the next digit (5) from the dividend and append it to 120, then repeat: 1205 / 397

Advancing to step 4:
397 goes into 1205 3 times with a remainder of 14.
The next digit of our result is 3. 
Result so far: 23.0
If we subtract 1191 from 1205, we get 14.
Append the next digit (2) from the dividend to 14 and continue with: 142 / 397

Advancing to step 5:
397 can be fit into 142 0 times, resulting in a remainder of 142.
Write down 0 as next digit of the result. 
Result so far: 230.0
If we subtract 0 from 142, we get 142.
Bring next digit (5) of the dividend behind the 142 and repeat the process: 1425 / 397

Going ahead to step 6:
If we divide 1425 by 397, we get 3 and a remainder of 234.
The number 3 becomes the next digit in our result. 
Result so far: 2303.0
Subtract 1191 from 1425 to get 234.
Grab the next digit (1) from the dividend, add it to 234, then carry on: 2341 / 397

Step 7:
2341 divided by 397 is 5 with a remainder of 356.
Write down 5 as next digit of the result. 
Result so far: 23035.0
Subtracting 1985 from 2341 leaves us with 356.
Bring next digit (9) of the dividend behind the 356 and repeat the process: 3569 / 397

Going ahead to step 8:
397 goes into 3569 8 times with a remainder of 393.
Use 8 as the next digit of our solution. 
Result so far: 230358.0
If we subtract 3176 from 3569, we get 393.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3930, and continue the process.

Let's proceed to step 9:
397 goes into 3930 9 times with a remainder of 357.
The next digit of our result is 9. 
Result so far: 230358.9
If we take 3573 away from 3930, we end up with 357.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3570, and continue the process.

Moving on to step 10:
397 can be fit into 3570 8 times, resulting in a remainder of 394.
The next digit of our result is 8. 
Result so far: 230358.98
Subtract 3176 from 3570 to get 394.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3940, and continue the process.

Going ahead to step 11:
397 can be fit into 3940 9 times, resulting in a remainder of 367.
The number 9 becomes the next digit in our result. 
Result so far: 230358.989
Subtracting 3573 from 3940 leaves us with 367.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3670, and continue the process.

Moving on to step 12:
When dividing 3670 by 397, we get 9 with a remainder of 97.
Put 9 as the next digit of the answer. 
Result so far: 230358.9899
If we subtract 3573 from 3670, we get 97.
Since there are no more digits in the dividend, we add a zero to the remainder making it 970, and continue the process.

Our division results in 230358.9899 with a remaining 0.00097.