743239 ÷ 19 
The aim is to understand the frequency of 19 in 743239.

Let's proceed to step 1:
7 divided by 19 is 0 with a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Take the next digit (4) from the dividend and append it to 7, then repeat: 74 / 19

Advancing to step 2:
If we divide 74 by 19, we get 3 and a remainder of 17.
Put 3 as the next digit of the answer. 
Result so far: 3.0
If we subtract 57 from 74, we get 17.
Take the next digit (3) from the dividend and append it to 17, then repeat: 173 / 19

Moving on to step 3:
The number 19 fits into 173 9 times, leaving a remainder of 2.
Write down 9 as next digit of the result. 
Result so far: 39.0
If we take 171 away from 173, we end up with 2.
Include the next digit (2) from the dividend after 2, then repeat: 22 / 19

Going ahead to step 4:
The number 19 fits into 22 1 times, leaving a remainder of 3.
Use 1 as the next digit of our solution. 
Result so far: 391.0
If we subtract 19 from 22, we get 3.
Append the next digit (3) from the dividend to 3 and continue with: 33 / 19

Moving on to step 5:
If we divide 33 by 19, we get 1 and a remainder of 14.
The number 1 becomes the next digit in our result. 
Result so far: 3911.0
Subtract 19 from 33 to get 14.
Take the next digit (9) from the dividend and append it to 14, then repeat: 149 / 19

Let's proceed to step 6:
The number 19 fits into 149 7 times, leaving a remainder of 16.
Use 7 as the next digit of our solution. 
Result so far: 39117.0
Deduct 133 from 149 and we're left with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Advancing to step 7:
The number 19 fits into 160 8 times, leaving a remainder of 8.
Write down 8 as next digit of the result. 
Result so far: 39117.8
Subtract 152 from 160 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Step 8:
19 can be fit into 80 4 times, resulting in a remainder of 4.
Put 4 as the next digit of the answer. 
Result so far: 39117.84
Subtract 76 from 80 to get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Moving on to step 9:
The number 19 fits into 40 2 times, leaving a remainder of 2.
Use 2 as the next digit of our solution. 
Result so far: 39117.842
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.

Advancing to step 10:
If we divide 20 by 19, we get 1 and a remainder of 1.
The number 1 becomes the next digit in our result. 
Result so far: 39117.8421
If we subtract 19 from 20, we 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.

Let's proceed to step 11:
The number 19 fits into 10 0 times, leaving a remainder of 10.
Write down 0 as next digit of the result. 
Result so far: 39117.8421
The remainder is 10 after subtracting 0 from 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 12:
If we divide 100 by 19, we get 5 and a remainder of 5.
Put 5 as the next digit of the answer. 
Result so far: 39117.842105
Subtracting 95 from 100 leaves us with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Advancing to step 13:
19 goes into 50 2 times with a remainder of 12.
Use 2 as the next digit of our solution. 
Result so far: 39117.8421052
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.

Advancing to step 14:
19 goes into 120 6 times with a remainder of 6.
Use 6 as the next digit of our solution. 
Result so far: 39117.84210526
If we subtract 114 from 120, we 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.

The final result is 39117.84210526 with a remainder of 6e-09.