18020453 divided by 19 
The aim is to understand the frequency of 19 in 18020453.

Advancing to step 1:
When dividing 1 by 19, we get 0 with a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Take the next digit (8) from the dividend and append it to 1, then repeat: 18 / 19

Going ahead to step 2:
The number 19 fits into 18 0 times, leaving a remainder of 18.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 18 leaves us with 18.
Include the next digit (0) from the dividend after 18, then repeat: 180 / 19

Step 3:
When dividing 180 by 19, we get 9 with a remainder of 9.
The next digit of our result is 9. 
Result so far: 9.0
If we subtract 171 from 180, we get 9.
Take the next digit (2) from the dividend and append it to 9, then repeat: 92 / 19

On to step 4:
19 can be fit into 92 4 times, resulting in a remainder of 16.
The number 4 becomes the next digit in our result. 
Result so far: 94.0
Deduct 76 from 92 and we're left with 16.
Take the next digit (0) from the dividend and append it to 16, then repeat: 160 / 19

On to step 5:
19 goes into 160 8 times with a remainder of 8.
Record the quotient 8 as the next digit in the result. 
Result so far: 948.0
The remainder is 8 after subtracting 152 from 160.
Take the next digit (4) from the dividend and append it to 8, then repeat: 84 / 19

Going ahead to step 6:
When dividing 84 by 19, we get 4 with a remainder of 8.
Put 4 as the next digit of the answer. 
Result so far: 9484.0
The remainder is 8 after subtracting 76 from 84.
Fetch the next digit (5) from the dividend, attach it to 8 and continue: 85 / 19

Step 7:
The number 19 fits into 85 4 times, leaving a remainder of 9.
Record the quotient 4 as the next digit in the result. 
Result so far: 94844.0
The remainder is 9 after subtracting 76 from 85.
Include the next digit (3) from the dividend after 9, then repeat: 93 / 19

Moving on to step 8:
The number 19 fits into 93 4 times, leaving a remainder of 17.
Use 4 as the next digit of our solution. 
Result so far: 948444.0
If we subtract 76 from 93, we get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Let's proceed to step 9:
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: 948444.8
If we take 152 away from 170, we end up 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.

Advancing to step 10:
19 can be fit into 180 9 times, resulting in a remainder of 9.
Use 9 as the next digit of our solution. 
Result so far: 948444.89
If we subtract 171 from 180, we get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Going ahead to step 11:
The number 19 fits into 90 4 times, leaving a remainder of 14.
The number 4 becomes the next digit in our result. 
Result so far: 948444.894
Subtract 76 from 90 to get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Advancing to step 12:
The number 19 fits into 140 7 times, leaving a remainder of 7.
Put 7 as the next digit of the answer. 
Result so far: 948444.8947
Subtracting 133 from 140 leaves us with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Moving on to step 13:
When dividing 70 by 19, we get 3 with a remainder of 13.
Put 3 as the next digit of the answer. 
Result so far: 948444.89473
Subtract 57 from 70 to get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Moving on to step 14:
If we divide 130 by 19, we get 6 and a remainder of 16.
The number 6 becomes the next digit in our result. 
Result so far: 948444.894736
Deduct 114 from 130 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.

Moving on to step 15:
The number 19 fits into 160 8 times, leaving a remainder of 8.
The number 8 becomes the next digit in our result. 
Result so far: 948444.8947368
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.

Going ahead to step 16:
If we divide 80 by 19, we get 4 and a remainder of 4.
Record the quotient 4 as the next digit in the result. 
Result so far: 948444.89473684
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.

The final outcome is 948444.89473684, with a leftover of 4e-09.