391894 ÷ 19 
The aim is to understand the frequency of 19 in 391894.

Step 1:
When dividing 3 by 19, we get 0 with a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Bring next digit (9) of the dividend behind the 3 and repeat the process: 39 / 19

On to step 2:
19 can be fit into 39 2 times, resulting in a remainder of 1.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Subtracting 38 from 39 leaves us with 1.
Fetch the next digit (1) from the dividend, attach it to 1 and continue: 11 / 19

Going ahead to step 3:
If we divide 11 by 19, we get 0 and a remainder of 11.
Record the quotient 0 as the next digit in the result. 
Result so far: 20.0
If we subtract 0 from 11, we get 11.
Fetch the next digit (8) from the dividend, attach it to 11 and continue: 118 / 19

Let's proceed to step 4:
19 can be fit into 118 6 times, resulting in a remainder of 4.
Record the quotient 6 as the next digit in the result. 
Result so far: 206.0
If we take 114 away from 118, we end up with 4.
Append the next digit (9) from the dividend to 4 and continue with: 49 / 19

Let's proceed to step 5:
49 divided by 19 is 2 with a remainder of 11.
The number 2 becomes the next digit in our result. 
Result so far: 2062.0
If we take 38 away from 49, we end up with 11.
Fetch the next digit (4) from the dividend, attach it to 11 and continue: 114 / 19

Step 6:
19 can be fit into 114 6 times, resulting in a remainder of 0.
Put 6 as the next digit of the answer. 
Result so far: 20626.0
The remainder is 0 after subtracting 114 from 114.
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 7:
The number 19 fits into 0 0 times, leaving a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 20626.0
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.

Step 8:
0 divided by 19 is 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 20626.0
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.

The final result is 20626.0 with a remainder of 0.0.