840289 ÷ 16 
The aim is to understand the frequency of 16 in 840289.

Going ahead to step 1:
8 divided by 16 is 0 with a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Fetch the next digit (4) from the dividend, attach it to 8 and continue: 84 / 16

Moving on to step 2:
84 divided by 16 is 5 with a remainder of 4.
Write down 5 as next digit of the result. 
Result so far: 5.0
If we take 80 away from 84, we end up with 4.
Grab the next digit (0) from the dividend, add it to 4, then carry on: 40 / 16

Step 3:
16 can be fit into 40 2 times, resulting in a remainder of 8.
The number 2 becomes the next digit in our result. 
Result so far: 52.0
If we take 32 away from 40, we end up with 8.
Append the next digit (2) from the dividend to 8 and continue with: 82 / 16

Moving on to step 4:
If we divide 82 by 16, we get 5 and a remainder of 2.
Record the quotient 5 as the next digit in the result. 
Result so far: 525.0
If we take 80 away from 82, we end up with 2.
Fetch the next digit (8) from the dividend, attach it to 2 and continue: 28 / 16

On to step 5:
28 divided by 16 is 1 with a remainder of 12.
Put 1 as the next digit of the answer. 
Result so far: 5251.0
Deduct 16 from 28 and we're left with 12.
Grab the next digit (9) from the dividend, add it to 12, then carry on: 129 / 16

Advancing to step 6:
The number 16 fits into 129 8 times, leaving a remainder of 1.
Use 8 as the next digit of our solution. 
Result so far: 52518.0
Subtracting 128 from 129 leaves us with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

On to step 7:
When dividing 10 by 16, we get 0 with a remainder of 10.
Record the quotient 0 as the next digit in the result. 
Result so far: 52518.0
If we subtract 0 from 10, we 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.

Moving on to step 8:
The number 16 fits into 100 6 times, leaving a remainder of 4.
The next digit of our result is 6. 
Result so far: 52518.06
Subtract 96 from 100 to get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Moving on to step 9:
40 divided by 16 is 2 with a remainder of 8.
The next digit of our result is 2. 
Result so far: 52518.062
The remainder is 8 after subtracting 32 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Advancing to step 10:
When dividing 80 by 16, we get 5 with a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 52518.0625
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.

Advancing to step 11:
The number 16 fits into 0 0 times, leaving a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 52518.0625
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.

On to step 12:
The number 16 fits into 0 0 times, leaving a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 52518.0625
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.

After the division, we end up with 52518.0625 and a remainder of 0.0.