387745 ÷ 99 
The aim is to understand the frequency of 99 in 387745.

On to step 1:
If we divide 3 by 99, we get 0 and a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Include the next digit (8) from the dividend after 3, then repeat: 38 / 99

Going ahead to step 2:
38 divided by 99 is 0 with a remainder of 38.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 38, we get 38.
Fetch the next digit (7) from the dividend, attach it to 38 and continue: 387 / 99

Going ahead to step 3:
387 divided by 99 is 3 with a remainder of 90.
The next digit of our result is 3. 
Result so far: 3.0
The remainder is 90 after subtracting 297 from 387.
Include the next digit (7) from the dividend after 90, then repeat: 907 / 99

Let's proceed to step 4:
99 can be fit into 907 9 times, resulting in a remainder of 16.
Put 9 as the next digit of the answer. 
Result so far: 39.0
If we take 891 away from 907, we end up with 16.
Take the next digit (4) from the dividend and append it to 16, then repeat: 164 / 99

Moving on to step 5:
99 goes into 164 1 times with a remainder of 65.
The number 1 becomes the next digit in our result. 
Result so far: 391.0
If we subtract 99 from 164, we get 65.
Grab the next digit (5) from the dividend, add it to 65, then carry on: 655 / 99

Let's proceed to step 6:
99 goes into 655 6 times with a remainder of 61.
Write down 6 as next digit of the result. 
Result so far: 3916.0
Deduct 594 from 655 and we're left with 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Let's proceed to step 7:
610 divided by 99 is 6 with a remainder of 16.
Write down 6 as next digit of the result. 
Result so far: 3916.6
If we take 594 away from 610, we end up with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Let's proceed to step 8:
If we divide 160 by 99, we get 1 and a remainder of 61.
Use 1 as the next digit of our solution. 
Result so far: 3916.61
Subtract 99 from 160 to get 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Step 9:
When dividing 610 by 99, we get 6 with a remainder of 16.
Put 6 as the next digit of the answer. 
Result so far: 3916.616
Subtracting 594 from 610 leaves us with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Moving on to step 10:
99 goes into 160 1 times with a remainder of 61.
Write down 1 as next digit of the result. 
Result so far: 3916.6161
If we subtract 99 from 160, we get 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Going ahead to step 11:
If we divide 610 by 99, we get 6 and a remainder of 16.
Record the quotient 6 as the next digit in the result. 
Result so far: 3916.61616
Deduct 594 from 610 and we're left with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Step 12:
The number 99 fits into 160 1 times, leaving a remainder of 61.
Use 1 as the next digit of our solution. 
Result so far: 3916.616161
The remainder is 61 after subtracting 99 from 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Going ahead to step 13:
If we divide 610 by 99, we get 6 and a remainder of 16.
Use 6 as the next digit of our solution. 
Result so far: 3916.6161616
Deduct 594 from 610 and we're left with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Step 14:
99 goes into 160 1 times with a remainder of 61.
Use 1 as the next digit of our solution. 
Result so far: 3916.61616161
Deduct 99 from 160 and we're left with 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

The final outcome is 3916.61616161, with a leftover of 6.1e-08.