We look at the division of 20901919 by 304 
The aim is to understand the frequency of 304 in 20901919.

Going ahead to step 1:
If we divide 2 by 304, we get 0 and a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Grab the next digit (0) from the dividend, add it to 2, then carry on: 20 / 304

Advancing to step 2:
If we divide 20 by 304, we get 0 and a remainder of 20.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 20 and we're left with 20.
Bring next digit (9) of the dividend behind the 20 and repeat the process: 209 / 304

On to step 3:
209 divided by 304 is 0 with a remainder of 209.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 209 leaves us with 209.
Grab the next digit (0) from the dividend, add it to 209, then carry on: 2090 / 304

Step 4:
When dividing 2090 by 304, we get 6 with a remainder of 266.
Use 6 as the next digit of our solution. 
Result so far: 6.0
The remainder is 266 after subtracting 1824 from 2090.
Grab the next digit (1) from the dividend, add it to 266, then carry on: 2661 / 304

Going ahead to step 5:
If we divide 2661 by 304, we get 8 and a remainder of 229.
Use 8 as the next digit of our solution. 
Result so far: 68.0
Deduct 2432 from 2661 and we're left with 229.
Grab the next digit (9) from the dividend, add it to 229, then carry on: 2299 / 304

Step 6:
304 can be fit into 2299 7 times, resulting in a remainder of 171.
The number 7 becomes the next digit in our result. 
Result so far: 687.0
If we subtract 2128 from 2299, we get 171.
Grab the next digit (1) from the dividend, add it to 171, then carry on: 1711 / 304

Let's proceed to step 7:
304 goes into 1711 5 times with a remainder of 191.
The number 5 becomes the next digit in our result. 
Result so far: 6875.0
If we subtract 1520 from 1711, we get 191.
Bring next digit (9) of the dividend behind the 191 and repeat the process: 1919 / 304

Going ahead to step 8:
1919 divided by 304 is 6 with a remainder of 95.
Write down 6 as next digit of the result. 
Result so far: 68756.0
Subtract 1824 from 1919 to get 95.
Since there are no more digits in the dividend, we add a zero to the remainder making it 950, and continue the process.

Moving on to step 9:
304 can be fit into 950 3 times, resulting in a remainder of 38.
Put 3 as the next digit of the answer. 
Result so far: 68756.3
Subtracting 912 from 950 leaves us with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Going ahead to step 10:
304 can be fit into 380 1 times, resulting in a remainder of 76.
Use 1 as the next digit of our solution. 
Result so far: 68756.31
Subtract 304 from 380 to get 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Moving on to step 11:
The number 304 fits into 760 2 times, leaving a remainder of 152.
The next digit of our result is 2. 
Result so far: 68756.312
If we take 608 away from 760, we end up with 152.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1520, and continue the process.

On to step 12:
1520 divided by 304 is 5 with a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 68756.3125
Deduct 1520 from 1520 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 13:
If we divide 0 by 304, we get 0 and a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 68756.3125
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 14:
0 divided by 304 is 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 68756.3125
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final outcome is 68756.3125, with a leftover of 0.0.