We're dividing 18151946 by 16 
The aim is to understand the frequency of 16 in 18151946.

Step 1:
16 goes into 1 0 times with a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Bring next digit (8) of the dividend behind the 1 and repeat the process: 18 / 16

Going ahead to step 2:
16 goes into 18 1 times with a remainder of 2.
The next digit of our result is 1. 
Result so far: 1.0
Subtract 16 from 18 to get 2.
Take the next digit (1) from the dividend and append it to 2, then repeat: 21 / 16

Advancing to step 3:
The number 16 fits into 21 1 times, leaving a remainder of 5.
The number 1 becomes the next digit in our result. 
Result so far: 11.0
The remainder is 5 after subtracting 16 from 21.
Grab the next digit (5) from the dividend, add it to 5, then carry on: 55 / 16

Moving on to step 4:
55 divided by 16 is 3 with a remainder of 7.
Put 3 as the next digit of the answer. 
Result so far: 113.0
If we subtract 48 from 55, we get 7.
Take the next digit (1) from the dividend and append it to 7, then repeat: 71 / 16

Advancing to step 5:
If we divide 71 by 16, we get 4 and a remainder of 7.
The number 4 becomes the next digit in our result. 
Result so far: 1134.0
The remainder is 7 after subtracting 64 from 71.
Include the next digit (9) from the dividend after 7, then repeat: 79 / 16

Going ahead to step 6:
If we divide 79 by 16, we get 4 and a remainder of 15.
Use 4 as the next digit of our solution. 
Result so far: 11344.0
Subtracting 64 from 79 leaves us with 15.
Fetch the next digit (4) from the dividend, attach it to 15 and continue: 154 / 16

Advancing to step 7:
When dividing 154 by 16, we get 9 with a remainder of 10.
Write down 9 as next digit of the result. 
Result so far: 113449.0
Subtract 144 from 154 to get 10.
Grab the next digit (6) from the dividend, add it to 10, then carry on: 106 / 16

On to step 8:
When dividing 106 by 16, we get 6 with a remainder of 10.
Record the quotient 6 as the next digit in the result. 
Result so far: 1134496.0
Subtract 96 from 106 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 9:
The number 16 fits into 100 6 times, leaving a remainder of 4.
Record the quotient 6 as the next digit in the result. 
Result so far: 1134496.6
If we take 96 away from 100, 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.

Going ahead to step 10:
The number 16 fits into 40 2 times, leaving a remainder of 8.
Use 2 as the next digit of our solution. 
Result so far: 1134496.62
Deduct 32 from 40 and we're left 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.

Let's proceed to step 11:
If we divide 80 by 16, we get 5 and a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 1134496.625
If we subtract 80 from 80, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 12:
If we divide 0 by 16, we get 0 and a remainder of 0.
The next digit of our result is 0. 
Result so far: 1134496.625
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 13:
16 can be fit into 0 0 times, resulting in a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 1134496.625
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.

The final result is 1134496.625 with a remainder of 0.0.