We're dividing 325419 by 15 
The aim is to understand the frequency of 15 in 325419.

Step 1:
The number 15 fits into 3 0 times, leaving a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Take the next digit (2) from the dividend and append it to 3, then repeat: 32 / 15

Step 2:
15 can be fit into 32 2 times, resulting in a remainder of 2.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Subtract 30 from 32 to get 2.
Take the next digit (5) from the dividend and append it to 2, then repeat: 25 / 15

On to step 3:
If we divide 25 by 15, we get 1 and a remainder of 10.
Use 1 as the next digit of our solution. 
Result so far: 21.0
Subtract 15 from 25 to get 10.
Bring next digit (4) of the dividend behind the 10 and repeat the process: 104 / 15

Step 4:
15 goes into 104 6 times with a remainder of 14.
The number 6 becomes the next digit in our result. 
Result so far: 216.0
Subtract 90 from 104 to get 14.
Append the next digit (1) from the dividend to 14 and continue with: 141 / 15

On to step 5:
141 divided by 15 is 9 with a remainder of 6.
The number 9 becomes the next digit in our result. 
Result so far: 2169.0
If we take 135 away from 141, we end up with 6.
Append the next digit (9) from the dividend to 6 and continue with: 69 / 15

Let's proceed to step 6:
The number 15 fits into 69 4 times, leaving a remainder of 9.
Put 4 as the next digit of the answer. 
Result so far: 21694.0
Deduct 60 from 69 and we're left with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Step 7:
When dividing 90 by 15, we get 6 with a remainder of 0.
The next digit of our result is 6. 
Result so far: 21694.6
If we subtract 90 from 90, 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.

On to step 8:
If we divide 0 by 15, we get 0 and a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 21694.6
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.

Let's proceed to step 9:
15 goes into 0 0 times with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 21694.6
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 21694.6 and a remainder of 0.0.