898618 divided by 15 
The aim is to understand the frequency of 15 in 898618.

On to step 1:
If we divide 8 by 15, we get 0 and a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Take the next digit (9) from the dividend and append it to 8, then repeat: 89 / 15

Moving on to step 2:
When dividing 89 by 15, we get 5 with a remainder of 14.
The next digit of our result is 5. 
Result so far: 5.0
The remainder is 14 after subtracting 75 from 89.
Grab the next digit (8) from the dividend, add it to 14, then carry on: 148 / 15

Advancing to step 3:
If we divide 148 by 15, we get 9 and a remainder of 13.
The next digit of our result is 9. 
Result so far: 59.0
Subtract 135 from 148 to get 13.
Grab the next digit (6) from the dividend, add it to 13, then carry on: 136 / 15

Let's proceed to step 4:
15 can be fit into 136 9 times, resulting in a remainder of 1.
Put 9 as the next digit of the answer. 
Result so far: 599.0
The remainder is 1 after subtracting 135 from 136.
Bring next digit (1) of the dividend behind the 1 and repeat the process: 11 / 15

On to step 5:
The number 15 fits into 11 0 times, leaving a remainder of 11.
Put 0 as the next digit of the answer. 
Result so far: 5990.0
Subtract 0 from 11 to get 11.
Append the next digit (8) from the dividend to 11 and continue with: 118 / 15

Going ahead to step 6:
The number 15 fits into 118 7 times, leaving a remainder of 13.
Write down 7 as next digit of the result. 
Result so far: 59907.0
Subtracting 105 from 118 leaves us with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Let's proceed to step 7:
When dividing 130 by 15, we get 8 with a remainder of 10.
The next digit of our result is 8. 
Result so far: 59907.8
Subtract 120 from 130 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.

On to step 8:
When dividing 100 by 15, we get 6 with a remainder of 10.
Write down 6 as next digit of the result. 
Result so far: 59907.86
Subtracting 90 from 100 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 9:
15 can be fit into 100 6 times, resulting in a remainder of 10.
Use 6 as the next digit of our solution. 
Result so far: 59907.866
Subtract 90 from 100 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.

The final outcome is 59907.866, with a leftover of 0.001.