97601289 ÷ 391 
The aim is to understand the frequency of 391 in 97601289.

Step 1:
If we divide 9 by 391, we get 0 and a remainder of 9.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 9, we get 9.
Include the next digit (7) from the dividend after 9, then repeat: 97 / 391

Let's proceed to step 2:
391 can be fit into 97 0 times, resulting in a remainder of 97.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 97 leaves us with 97.
Append the next digit (6) from the dividend to 97 and continue with: 976 / 391

Moving on to step 3:
391 goes into 976 2 times with a remainder of 194.
The next digit of our result is 2. 
Result so far: 2.0
The remainder is 194 after subtracting 782 from 976.
Bring next digit (0) of the dividend behind the 194 and repeat the process: 1940 / 391

Step 4:
1940 divided by 391 is 4 with a remainder of 376.
The next digit of our result is 4. 
Result so far: 24.0
If we subtract 1564 from 1940, we get 376.
Take the next digit (1) from the dividend and append it to 376, then repeat: 3761 / 391

Going ahead to step 5:
391 can be fit into 3761 9 times, resulting in a remainder of 242.
The next digit of our result is 9. 
Result so far: 249.0
Deduct 3519 from 3761 and we're left with 242.
Append the next digit (2) from the dividend to 242 and continue with: 2422 / 391

Advancing to step 6:
If we divide 2422 by 391, we get 6 and a remainder of 76.
Put 6 as the next digit of the answer. 
Result so far: 2496.0
The remainder is 76 after subtracting 2346 from 2422.
Take the next digit (8) from the dividend and append it to 76, then repeat: 768 / 391

Moving on to step 7:
If we divide 768 by 391, we get 1 and a remainder of 377.
Use 1 as the next digit of our solution. 
Result so far: 24961.0
Subtracting 391 from 768 leaves us with 377.
Grab the next digit (9) from the dividend, add it to 377, then carry on: 3779 / 391

Advancing to step 8:
The number 391 fits into 3779 9 times, leaving a remainder of 260.
Put 9 as the next digit of the answer. 
Result so far: 249619.0
The remainder is 260 after subtracting 3519 from 3779.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2600, and continue the process.

Going ahead to step 9:
The number 391 fits into 2600 6 times, leaving a remainder of 254.
The next digit of our result is 6. 
Result so far: 249619.6
If we subtract 2346 from 2600, we get 254.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2540, and continue the process.

Advancing to step 10:
If we divide 2540 by 391, we get 6 and a remainder of 194.
Use 6 as the next digit of our solution. 
Result so far: 249619.66
If we take 2346 away from 2540, we end up with 194.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1940, and continue the process.

Our division results in 249619.66 with a remaining 0.194.