We look at the division of 408315 by 19 
The aim is to understand the frequency of 19 in 408315.

On to step 1:
The number 19 fits into 4 0 times, leaving a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Append the next digit (0) from the dividend to 4 and continue with: 40 / 19

Advancing to step 2:
If we divide 40 by 19, we get 2 and a remainder of 2.
Write down 2 as next digit of the result. 
Result so far: 2.0
Subtract 38 from 40 to get 2.
Grab the next digit (8) from the dividend, add it to 2, then carry on: 28 / 19

Going ahead to step 3:
If we divide 28 by 19, we get 1 and a remainder of 9.
Put 1 as the next digit of the answer. 
Result so far: 21.0
If we take 19 away from 28, we end up with 9.
Include the next digit (3) from the dividend after 9, then repeat: 93 / 19

Moving on to step 4:
19 goes into 93 4 times with a remainder of 17.
Put 4 as the next digit of the answer. 
Result so far: 214.0
Deduct 76 from 93 and we're left with 17.
Fetch the next digit (1) from the dividend, attach it to 17 and continue: 171 / 19

Step 5:
The number 19 fits into 171 9 times, leaving a remainder of 0.
Write down 9 as next digit of the result. 
Result so far: 2149.0
Subtracting 171 from 171 leaves us with 0.
Take the next digit (5) from the dividend and append it to 0, then repeat: 5 / 19

Moving on to step 6:
19 goes into 5 0 times with a remainder of 5.
The next digit of our result is 0. 
Result so far: 21490.0
Subtract 0 from 5 to get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Step 7:
The number 19 fits into 50 2 times, leaving a remainder of 12.
Record the quotient 2 as the next digit in the result. 
Result so far: 21490.2
If we take 38 away from 50, we end up with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Moving on to step 8:
When dividing 120 by 19, we get 6 with a remainder of 6.
Write down 6 as next digit of the result. 
Result so far: 21490.26
Subtract 114 from 120 to get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Moving on to step 9:
19 goes into 60 3 times with a remainder of 3.
Use 3 as the next digit of our solution. 
Result so far: 21490.263
Deduct 57 from 60 and we're left with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Step 10:
19 can be fit into 30 1 times, resulting in a remainder of 11.
Use 1 as the next digit of our solution. 
Result so far: 21490.2631
Subtract 19 from 30 to 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.

Let's proceed to step 11:
19 goes into 110 5 times with a remainder of 15.
Use 5 as the next digit of our solution. 
Result so far: 21490.26315
Deduct 95 from 110 and we're left with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Advancing to step 12:
The number 19 fits into 150 7 times, leaving a remainder of 17.
The next digit of our result is 7. 
Result so far: 21490.263157
If we take 133 away from 150, we end up with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

On to step 13:
The number 19 fits into 170 8 times, leaving a remainder of 18.
Write down 8 as next digit of the result. 
Result so far: 21490.2631578
Subtract 152 from 170 to get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Let's proceed to step 14:
180 divided by 19 is 9 with a remainder of 9.
The next digit of our result is 9. 
Result so far: 21490.26315789
The remainder is 9 after subtracting 171 from 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

In conclusion, the division gives 21490.26315789 with a balance of 9e-09.