649946 divided by 15 
The aim is to understand the frequency of 15 in 649946.

Let's proceed to step 1:
If we divide 6 by 15, we get 0 and a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Grab the next digit (4) from the dividend, add it to 6, then carry on: 64 / 15

Going ahead to step 2:
15 can be fit into 64 4 times, resulting in a remainder of 4.
Use 4 as the next digit of our solution. 
Result so far: 4.0
The remainder is 4 after subtracting 60 from 64.
Take the next digit (9) from the dividend and append it to 4, then repeat: 49 / 15

Going ahead to step 3:
15 can be fit into 49 3 times, resulting in a remainder of 4.
Use 3 as the next digit of our solution. 
Result so far: 43.0
If we take 45 away from 49, we end up with 4.
Take the next digit (9) from the dividend and append it to 4, then repeat: 49 / 15

On to step 4:
When dividing 49 by 15, we get 3 with a remainder of 4.
Write down 3 as next digit of the result. 
Result so far: 433.0
Subtracting 45 from 49 leaves us with 4.
Bring next digit (4) of the dividend behind the 4 and repeat the process: 44 / 15

Going ahead to step 5:
15 can be fit into 44 2 times, resulting in a remainder of 14.
Put 2 as the next digit of the answer. 
Result so far: 4332.0
If we subtract 30 from 44, we get 14.
Append the next digit (6) from the dividend to 14 and continue with: 146 / 15

Moving on to step 6:
15 can be fit into 146 9 times, resulting in a remainder of 11.
Use 9 as the next digit of our solution. 
Result so far: 43329.0
If we subtract 135 from 146, we get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

On to step 7:
The number 15 fits into 110 7 times, leaving a remainder of 5.
The number 7 becomes the next digit in our result. 
Result so far: 43329.7
The remainder is 5 after subtracting 105 from 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Let's proceed to step 8:
If we divide 50 by 15, we get 3 and a remainder of 5.
Put 3 as the next digit of the answer. 
Result so far: 43329.73
If we take 45 away from 50, we end up 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.

On to step 9:
The number 15 fits into 50 3 times, leaving a remainder of 5.
The number 3 becomes the next digit in our result. 
Result so far: 43329.733
The remainder is 5 after subtracting 45 from 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Our division results in 43329.733 with a remaining 0.0005.