We look at the division of 216453 by 19 
The aim is to understand the frequency of 19 in 216453.

Going ahead to step 1:
When dividing 2 by 19, we get 0 with a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Take the next digit (1) from the dividend and append it to 2, then repeat: 21 / 19

On to step 2:
19 goes into 21 1 times with a remainder of 2.
The next digit of our result is 1. 
Result so far: 1.0
If we take 19 away from 21, we end up with 2.
Append the next digit (6) from the dividend to 2 and continue with: 26 / 19

Let's proceed to step 3:
26 divided by 19 is 1 with a remainder of 7.
Record the quotient 1 as the next digit in the result. 
Result so far: 11.0
Subtracting 19 from 26 leaves us with 7.
Append the next digit (4) from the dividend to 7 and continue with: 74 / 19

Going ahead to step 4:
19 goes into 74 3 times with a remainder of 17.
Record the quotient 3 as the next digit in the result. 
Result so far: 113.0
If we subtract 57 from 74, we get 17.
Include the next digit (5) from the dividend after 17, then repeat: 175 / 19

On to step 5:
The number 19 fits into 175 9 times, leaving a remainder of 4.
Use 9 as the next digit of our solution. 
Result so far: 1139.0
If we subtract 171 from 175, we get 4.
Grab the next digit (3) from the dividend, add it to 4, then carry on: 43 / 19

Moving on to step 6:
19 can be fit into 43 2 times, resulting in a remainder of 5.
Record the quotient 2 as the next digit in the result. 
Result so far: 11392.0
Deduct 38 from 43 and we're left 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.

Moving on to step 7:
19 goes into 50 2 times with a remainder of 12.
The next digit of our result is 2. 
Result so far: 11392.2
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.

Let's proceed to step 8:
120 divided by 19 is 6 with a remainder of 6.
Use 6 as the next digit of our solution. 
Result so far: 11392.26
The remainder is 6 after subtracting 114 from 120.
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 can be fit into 60 3 times, resulting in a remainder of 3.
Use 3 as the next digit of our solution. 
Result so far: 11392.263
Subtracting 57 from 60 leaves us 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.

Moving on to step 10:
19 goes into 30 1 times with a remainder of 11.
Put 1 as the next digit of the answer. 
Result so far: 11392.2631
If we subtract 19 from 30, we 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.
The next digit of our result is 5. 
Result so far: 11392.26315
Subtract 95 from 110 to get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

On to step 12:
The number 19 fits into 150 7 times, leaving a remainder of 17.
Write down 7 as next digit of the result. 
Result so far: 11392.263157
Deduct 133 from 150 and we're left 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.

Advancing to step 13:
170 divided by 19 is 8 with a remainder of 18.
Record the quotient 8 as the next digit in the result. 
Result so far: 11392.2631578
Deduct 152 from 170 and we're left with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Step 14:
The number 19 fits into 180 9 times, leaving a remainder of 9.
Put 9 as the next digit of the answer. 
Result so far: 11392.26315789
If we take 171 away from 180, we end up 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.

After the division, we end up with 11392.26315789 and a remainder of 9e-09.