We look at the division of 428950 by 19 
The aim is to understand the frequency of 19 in 428950.

Step 1:
The number 19 fits into 4 0 times, leaving a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Include the next digit (2) from the dividend after 4, then repeat: 42 / 19

Step 2:
19 goes into 42 2 times with a remainder of 4.
The next digit of our result is 2. 
Result so far: 2.0
If we take 38 away from 42, we end up with 4.
Grab the next digit (8) from the dividend, add it to 4, then carry on: 48 / 19

Step 3:
48 divided by 19 is 2 with a remainder of 10.
Write down 2 as next digit of the result. 
Result so far: 22.0
If we take 38 away from 48, we end up with 10.
Fetch the next digit (9) from the dividend, attach it to 10 and continue: 109 / 19

Moving on to step 4:
19 goes into 109 5 times with a remainder of 14.
Use 5 as the next digit of our solution. 
Result so far: 225.0
Deduct 95 from 109 and we're left with 14.
Append the next digit (5) from the dividend to 14 and continue with: 145 / 19

Step 5:
If we divide 145 by 19, we get 7 and a remainder of 12.
The next digit of our result is 7. 
Result so far: 2257.0
If we subtract 133 from 145, we get 12.
Bring next digit (0) of the dividend behind the 12 and repeat the process: 120 / 19

Advancing to step 6:
19 goes into 120 6 times with a remainder of 6.
The number 6 becomes the next digit in our result. 
Result so far: 22576.0
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.

Advancing to step 7:
19 goes into 60 3 times with a remainder of 3.
Put 3 as the next digit of the answer. 
Result so far: 22576.3
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.

Step 8:
The number 19 fits into 30 1 times, leaving a remainder of 11.
Record the quotient 1 as the next digit in the result. 
Result so far: 22576.31
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.

Step 9:
19 can be fit into 110 5 times, resulting in a remainder of 15.
Put 5 as the next digit of the answer. 
Result so far: 22576.315
Deduct 95 from 110 and we're left with 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 10:
19 can be fit into 150 7 times, resulting in a remainder of 17.
Record the quotient 7 as the next digit in the result. 
Result so far: 22576.3157
Subtracting 133 from 150 leaves us 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.

On to step 11:
If we divide 170 by 19, we get 8 and a remainder of 18.
The next digit of our result is 8. 
Result so far: 22576.31578
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.

Moving on to step 12:
180 divided by 19 is 9 with a remainder of 9.
Use 9 as the next digit of our solution. 
Result so far: 22576.315789
Subtract 171 from 180 to 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.

Advancing to step 13:
19 goes into 90 4 times with a remainder of 14.
The next digit of our result is 4. 
Result so far: 22576.3157894
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.

Moving on to step 14:
The number 19 fits into 140 7 times, leaving a remainder of 7.
The next digit of our result is 7. 
Result so far: 22576.31578947
If we take 133 away from 140, we end up 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.

The final result is 22576.31578947 with a remainder of 7e-09.