We look at the division of 99899295 by 161 
The aim is to understand the frequency of 161 in 99899295.

On to step 1:
161 can be fit into 9 0 times, resulting in a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 9 to get 9.
Include the next digit (9) from the dividend after 9, then repeat: 99 / 161

Moving on to step 2:
If we divide 99 by 161, we get 0 and a remainder of 99.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 99 leaves us with 99.
Fetch the next digit (8) from the dividend, attach it to 99 and continue: 998 / 161

Step 3:
998 divided by 161 is 6 with a remainder of 32.
The next digit of our result is 6. 
Result so far: 6.0
Subtracting 966 from 998 leaves us with 32.
Take the next digit (9) from the dividend and append it to 32, then repeat: 329 / 161

Going ahead to step 4:
161 goes into 329 2 times with a remainder of 7.
The number 2 becomes the next digit in our result. 
Result so far: 62.0
Subtracting 322 from 329 leaves us with 7.
Include the next digit (9) from the dividend after 7, then repeat: 79 / 161

Going ahead to step 5:
79 divided by 161 is 0 with a remainder of 79.
Record the quotient 0 as the next digit in the result. 
Result so far: 620.0
If we take 0 away from 79, we end up with 79.
Append the next digit (2) from the dividend to 79 and continue with: 792 / 161

Step 6:
If we divide 792 by 161, we get 4 and a remainder of 148.
Use 4 as the next digit of our solution. 
Result so far: 6204.0
Subtracting 644 from 792 leaves us with 148.
Include the next digit (9) from the dividend after 148, then repeat: 1489 / 161

Step 7:
The number 161 fits into 1489 9 times, leaving a remainder of 40.
The number 9 becomes the next digit in our result. 
Result so far: 62049.0
Subtracting 1449 from 1489 leaves us with 40.
Take the next digit (5) from the dividend and append it to 40, then repeat: 405 / 161

On to step 8:
If we divide 405 by 161, we get 2 and a remainder of 83.
Put 2 as the next digit of the answer. 
Result so far: 620492.0
If we subtract 322 from 405, we get 83.
Since there are no more digits in the dividend, we add a zero to the remainder making it 830, and continue the process.

Step 9:
161 goes into 830 5 times with a remainder of 25.
Write down 5 as next digit of the result. 
Result so far: 620492.5
Deduct 805 from 830 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.

Advancing to step 10:
If we divide 250 by 161, we get 1 and a remainder of 89.
Write down 1 as next digit of the result. 
Result so far: 620492.51
If we subtract 161 from 250, we get 89.
Since there are no more digits in the dividend, we add a zero to the remainder making it 890, and continue the process.

On to step 11:
The number 161 fits into 890 5 times, leaving a remainder of 85.
Put 5 as the next digit of the answer. 
Result so far: 620492.515
If we subtract 805 from 890, we get 85.
Since there are no more digits in the dividend, we add a zero to the remainder making it 850, and continue the process.

Step 12:
If we divide 850 by 161, we get 5 and a remainder of 45.
Use 5 as the next digit of our solution. 
Result so far: 620492.5155
If we subtract 805 from 850, we get 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Our division results in 620492.5155 with a remaining 0.00045.