210930 ÷ 19 
The aim is to understand the frequency of 19 in 210930.

Step 1:
When dividing 2 by 19, we get 0 with a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Fetch the next digit (1) from the dividend, attach it to 2 and continue: 21 / 19

Moving on to step 2:
19 can be fit into 21 1 times, resulting in a remainder of 2.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtracting 19 from 21 leaves us with 2.
Include the next digit (0) from the dividend after 2, then repeat: 20 / 19

Step 3:
20 divided by 19 is 1 with a remainder of 1.
Record the quotient 1 as the next digit in the result. 
Result so far: 11.0
If we subtract 19 from 20, we get 1.
Grab the next digit (9) from the dividend, add it to 1, then carry on: 19 / 19

Step 4:
19 goes into 19 1 times with a remainder of 0.
Write down 1 as next digit of the result. 
Result so far: 111.0
Subtract 19 from 19 to get 0.
Take the next digit (3) from the dividend and append it to 0, then repeat: 3 / 19

Going ahead to step 5:
3 divided by 19 is 0 with a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 1110.0
Subtracting 0 from 3 leaves us with 3.
Bring next digit (0) of the dividend behind the 3 and repeat the process: 30 / 19

Step 6:
30 divided by 19 is 1 with a remainder of 11.
Put 1 as the next digit of the answer. 
Result so far: 11101.0
The remainder is 11 after subtracting 19 from 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Going ahead to step 7:
19 goes into 110 5 times with a remainder of 15.
Record the quotient 5 as the next digit in the result. 
Result so far: 11101.5
If we subtract 95 from 110, we 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.

Step 8:
19 can be fit into 150 7 times, resulting in a remainder of 17.
Write down 7 as next digit of the result. 
Result so far: 11101.57
If we take 133 away from 150, we end up 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.

Moving on to step 9:
If we divide 170 by 19, we get 8 and a remainder of 18.
Record the quotient 8 as the next digit in the result. 
Result so far: 11101.578
Subtract 152 from 170 to get 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:
180 divided by 19 is 9 with a remainder of 9.
The next digit of our result is 9. 
Result so far: 11101.5789
Deduct 171 from 180 and we're left 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.

Advancing to step 11:
When dividing 90 by 19, we get 4 with a remainder of 14.
Write down 4 as next digit of the result. 
Result so far: 11101.57894
If we subtract 76 from 90, we 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.

On to step 12:
140 divided by 19 is 7 with a remainder of 7.
Use 7 as the next digit of our solution. 
Result so far: 11101.578947
If we subtract 133 from 140, we get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Let's proceed to step 13:
70 divided by 19 is 3 with a remainder of 13.
Use 3 as the next digit of our solution. 
Result so far: 11101.5789473
Subtracting 57 from 70 leaves us with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Step 14:
The number 19 fits into 130 6 times, leaving a remainder of 16.
Use 6 as the next digit of our solution. 
Result so far: 11101.57894736
If we subtract 114 from 130, we get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

The final outcome is 11101.57894736, with a leftover of 1.6e-08.