We look at the division of 90963413 by 16 
The aim is to understand the frequency of 16 in 90963413.

Let's proceed to step 1:
If we divide 9 by 16, we get 0 and a remainder of 9.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 9 to get 9.
Append the next digit (0) from the dividend to 9 and continue with: 90 / 16

Going ahead to step 2:
90 divided by 16 is 5 with a remainder of 10.
The next digit of our result is 5. 
Result so far: 5.0
If we take 80 away from 90, we end up with 10.
Grab the next digit (9) from the dividend, add it to 10, then carry on: 109 / 16

Moving on to step 3:
16 goes into 109 6 times with a remainder of 13.
Record the quotient 6 as the next digit in the result. 
Result so far: 56.0
If we subtract 96 from 109, we get 13.
Append the next digit (6) from the dividend to 13 and continue with: 136 / 16

Moving on to step 4:
136 divided by 16 is 8 with a remainder of 8.
The number 8 becomes the next digit in our result. 
Result so far: 568.0
Deduct 128 from 136 and we're left with 8.
Include the next digit (3) from the dividend after 8, then repeat: 83 / 16

Moving on to step 5:
83 divided by 16 is 5 with a remainder of 3.
The number 5 becomes the next digit in our result. 
Result so far: 5685.0
The remainder is 3 after subtracting 80 from 83.
Fetch the next digit (4) from the dividend, attach it to 3 and continue: 34 / 16

Advancing to step 6:
16 can be fit into 34 2 times, resulting in a remainder of 2.
Write down 2 as next digit of the result. 
Result so far: 56852.0
If we take 32 away from 34, we end up with 2.
Take the next digit (1) from the dividend and append it to 2, then repeat: 21 / 16

Advancing to step 7:
The number 16 fits into 21 1 times, leaving a remainder of 5.
Put 1 as the next digit of the answer. 
Result so far: 568521.0
Subtracting 16 from 21 leaves us with 5.
Grab the next digit (3) from the dividend, add it to 5, then carry on: 53 / 16

Step 8:
When dividing 53 by 16, we get 3 with a remainder of 5.
Record the quotient 3 as the next digit in the result. 
Result so far: 5685213.0
Subtracting 48 from 53 leaves us with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Step 9:
16 can be fit into 50 3 times, resulting in a remainder of 2.
Record the quotient 3 as the next digit in the result. 
Result so far: 5685213.3
If we take 48 away from 50, we end up with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Going ahead to step 10:
20 divided by 16 is 1 with a remainder of 4.
The number 1 becomes the next digit in our result. 
Result so far: 5685213.31
If we take 16 away from 20, we end up with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

On to step 11:
When dividing 40 by 16, we get 2 with a remainder of 8.
The next digit of our result is 2. 
Result so far: 5685213.312
Subtracting 32 from 40 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Moving on to step 12:
16 can be fit into 80 5 times, resulting in a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 5685213.3125
The remainder is 0 after subtracting 80 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 13:
16 can be fit into 0 0 times, resulting in a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 5685213.3125
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 14:
16 goes into 0 0 times with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 5685213.3125
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The quotient of the division is 5685213.3125, and the remainder is 0.0.