398225 divided by 19 
The aim is to understand the frequency of 19 in 398225.

Let's proceed to step 1:
When dividing 3 by 19, we get 0 with a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Fetch the next digit (9) from the dividend, attach it to 3 and continue: 39 / 19

On to step 2:
The number 19 fits into 39 2 times, leaving a remainder of 1.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
Subtract 38 from 39 to get 1.
Grab the next digit (8) from the dividend, add it to 1, then carry on: 18 / 19

Let's proceed to step 3:
19 can be fit into 18 0 times, resulting in a remainder of 18.
The next digit of our result is 0. 
Result so far: 20.0
If we take 0 away from 18, we end up with 18.
Bring next digit (2) of the dividend behind the 18 and repeat the process: 182 / 19

Going ahead to step 4:
If we divide 182 by 19, we get 9 and a remainder of 11.
Use 9 as the next digit of our solution. 
Result so far: 209.0
Deduct 171 from 182 and we're left with 11.
Include the next digit (2) from the dividend after 11, then repeat: 112 / 19

Advancing to step 5:
If we divide 112 by 19, we get 5 and a remainder of 17.
The next digit of our result is 5. 
Result so far: 2095.0
Subtract 95 from 112 to get 17.
Append the next digit (5) from the dividend to 17 and continue with: 175 / 19

Moving on to step 6:
175 divided by 19 is 9 with a remainder of 4.
Write down 9 as next digit of the result. 
Result so far: 20959.0
If we take 171 away from 175, we end up with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Going ahead to step 7:
19 goes into 40 2 times with a remainder of 2.
Put 2 as the next digit of the answer. 
Result so far: 20959.2
If we take 38 away from 40, we end up with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Let's proceed to step 8:
20 divided by 19 is 1 with a remainder of 1.
Write down 1 as next digit of the result. 
Result so far: 20959.21
Subtract 19 from 20 to get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Step 9:
19 goes into 10 0 times with a remainder of 10.
Write down 0 as next digit of the result. 
Result so far: 20959.21
Subtract 0 from 10 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.

Moving on to step 10:
100 divided by 19 is 5 with a remainder of 5.
The next digit of our result is 5. 
Result so far: 20959.2105
If we subtract 95 from 100, we 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.

Going ahead to step 11:
50 divided by 19 is 2 with a remainder of 12.
Write down 2 as next digit of the result. 
Result so far: 20959.21052
Deduct 38 from 50 and we're left 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.

Going ahead to step 12:
When dividing 120 by 19, we get 6 with a remainder of 6.
Record the quotient 6 as the next digit in the result. 
Result so far: 20959.210526
Deduct 114 from 120 and we're left with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Advancing to step 13:
19 goes into 60 3 times with a remainder of 3.
Use 3 as the next digit of our solution. 
Result so far: 20959.2105263
The remainder is 3 after subtracting 57 from 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Advancing to step 14:
19 goes into 30 1 times with a remainder of 11.
Put 1 as the next digit of the answer. 
Result so far: 20959.21052631
Deduct 19 from 30 and we're left with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

The final outcome is 20959.21052631, with a leftover of 1.1e-08.