520872 ÷ 19 
The aim is to understand the frequency of 19 in 520872.

Moving on to step 1:
If we divide 5 by 19, we get 0 and a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Take the next digit (2) from the dividend and append it to 5, then repeat: 52 / 19

On to step 2:
52 divided by 19 is 2 with a remainder of 14.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
Subtracting 38 from 52 leaves us with 14.
Take the next digit (0) from the dividend and append it to 14, then repeat: 140 / 19

Step 3:
If we divide 140 by 19, we get 7 and a remainder of 7.
The next digit of our result is 7. 
Result so far: 27.0
If we take 133 away from 140, we end up with 7.
Include the next digit (8) from the dividend after 7, then repeat: 78 / 19

On to step 4:
The number 19 fits into 78 4 times, leaving a remainder of 2.
Use 4 as the next digit of our solution. 
Result so far: 274.0
The remainder is 2 after subtracting 76 from 78.
Bring next digit (7) of the dividend behind the 2 and repeat the process: 27 / 19

Moving on to step 5:
If we divide 27 by 19, we get 1 and a remainder of 8.
Put 1 as the next digit of the answer. 
Result so far: 2741.0
Subtract 19 from 27 to get 8.
Bring next digit (2) of the dividend behind the 8 and repeat the process: 82 / 19

Step 6:
When dividing 82 by 19, we get 4 with a remainder of 6.
The next digit of our result is 4. 
Result so far: 27414.0
If we subtract 76 from 82, 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.

On to step 7:
19 goes into 60 3 times with a remainder of 3.
The number 3 becomes the next digit in our result. 
Result so far: 27414.3
If we subtract 57 from 60, we get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Advancing to step 8:
30 divided by 19 is 1 with a remainder of 11.
The next digit of our result is 1. 
Result so far: 27414.31
Deduct 19 from 30 and we're left with 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 9:
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: 27414.315
The remainder is 15 after subtracting 95 from 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

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: 27414.3157
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.

Step 11:
19 goes into 170 8 times with a remainder of 18.
Record the quotient 8 as the next digit in the result. 
Result so far: 27414.31578
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 12:
19 goes into 180 9 times with a remainder of 9.
Record the quotient 9 as the next digit in the result. 
Result so far: 27414.315789
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.

Let's proceed to step 13:
When dividing 90 by 19, we get 4 with a remainder of 14.
Use 4 as the next digit of our solution. 
Result so far: 27414.3157894
Deduct 76 from 90 and we're left with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Let's proceed to step 14:
19 goes into 140 7 times with a remainder of 7.
Use 7 as the next digit of our solution. 
Result so far: 27414.31578947
Deduct 133 from 140 and we're left 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 outcome is 27414.31578947, with a leftover of 7e-09.