We look at the division of 91001615 by 299 
The aim is to understand the frequency of 299 in 91001615.

Step 1:
When dividing 9 by 299, we get 0 with a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 9 and we're left with 9.
Append the next digit (1) from the dividend to 9 and continue with: 91 / 299

Moving on to step 2:
The number 299 fits into 91 0 times, leaving a remainder of 91.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 91, we end up with 91.
Grab the next digit (0) from the dividend, add it to 91, then carry on: 910 / 299

Going ahead to step 3:
299 can be fit into 910 3 times, resulting in a remainder of 13.
Use 3 as the next digit of our solution. 
Result so far: 3.0
Subtract 897 from 910 to get 13.
Append the next digit (0) from the dividend to 13 and continue with: 130 / 299

Advancing to step 4:
When dividing 130 by 299, we get 0 with a remainder of 130.
Use 0 as the next digit of our solution. 
Result so far: 30.0
If we subtract 0 from 130, we get 130.
Take the next digit (1) from the dividend and append it to 130, then repeat: 1301 / 299

Moving on to step 5:
When dividing 1301 by 299, we get 4 with a remainder of 105.
The next digit of our result is 4. 
Result so far: 304.0
The remainder is 105 after subtracting 1196 from 1301.
Bring next digit (6) of the dividend behind the 105 and repeat the process: 1056 / 299

Advancing to step 6:
The number 299 fits into 1056 3 times, leaving a remainder of 159.
Write down 3 as next digit of the result. 
Result so far: 3043.0
Subtracting 897 from 1056 leaves us with 159.
Fetch the next digit (1) from the dividend, attach it to 159 and continue: 1591 / 299

Moving on to step 7:
If we divide 1591 by 299, we get 5 and a remainder of 96.
Record the quotient 5 as the next digit in the result. 
Result so far: 30435.0
Subtracting 1495 from 1591 leaves us with 96.
Append the next digit (5) from the dividend to 96 and continue with: 965 / 299

Moving on to step 8:
965 divided by 299 is 3 with a remainder of 68.
Use 3 as the next digit of our solution. 
Result so far: 304353.0
The remainder is 68 after subtracting 897 from 965.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Let's proceed to step 9:
If we divide 680 by 299, we get 2 and a remainder of 82.
The number 2 becomes the next digit in our result. 
Result so far: 304353.2
Deduct 598 from 680 and we're left with 82.
Since there are no more digits in the dividend, we add a zero to the remainder making it 820, and continue the process.

Step 10:
299 goes into 820 2 times with a remainder of 222.
The next digit of our result is 2. 
Result so far: 304353.22
The remainder is 222 after subtracting 598 from 820.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2220, and continue the process.

Our division results in 304353.22 with a remaining 0.222.