72025191 divided by 309 
The aim is to understand the frequency of 309 in 72025191.

Moving on to step 1:
7 divided by 309 is 0 with a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Append the next digit (2) from the dividend to 7 and continue with: 72 / 309

Advancing to step 2:
309 can be fit into 72 0 times, resulting in a remainder of 72.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 72 after subtracting 0 from 72.
Take the next digit (0) from the dividend and append it to 72, then repeat: 720 / 309

Going ahead to step 3:
The number 309 fits into 720 2 times, leaving a remainder of 102.
Use 2 as the next digit of our solution. 
Result so far: 2.0
If we take 618 away from 720, we end up with 102.
Include the next digit (2) from the dividend after 102, then repeat: 1022 / 309

On to step 4:
309 can be fit into 1022 3 times, resulting in a remainder of 95.
Record the quotient 3 as the next digit in the result. 
Result so far: 23.0
If we subtract 927 from 1022, we get 95.
Include the next digit (5) from the dividend after 95, then repeat: 955 / 309

Advancing to step 5:
When dividing 955 by 309, we get 3 with a remainder of 28.
The next digit of our result is 3. 
Result so far: 233.0
Subtracting 927 from 955 leaves us with 28.
Fetch the next digit (1) from the dividend, attach it to 28 and continue: 281 / 309

On to step 6:
The number 309 fits into 281 0 times, leaving a remainder of 281.
The number 0 becomes the next digit in our result. 
Result so far: 2330.0
Subtract 0 from 281 to get 281.
Grab the next digit (9) from the dividend, add it to 281, then carry on: 2819 / 309

Let's proceed to step 7:
If we divide 2819 by 309, we get 9 and a remainder of 38.
Use 9 as the next digit of our solution. 
Result so far: 23309.0
If we subtract 2781 from 2819, we get 38.
Bring next digit (1) of the dividend behind the 38 and repeat the process: 381 / 309

Moving on to step 8:
309 can be fit into 381 1 times, resulting in a remainder of 72.
Use 1 as the next digit of our solution. 
Result so far: 233091.0
The remainder is 72 after subtracting 309 from 381.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Moving on to step 9:
720 divided by 309 is 2 with a remainder of 102.
Write down 2 as next digit of the result. 
Result so far: 233091.2
The remainder is 102 after subtracting 618 from 720.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1020, and continue the process.

Advancing to step 10:
309 goes into 1020 3 times with a remainder of 93.
Record the quotient 3 as the next digit in the result. 
Result so far: 233091.23
Subtracting 927 from 1020 leaves us with 93.
Since there are no more digits in the dividend, we add a zero to the remainder making it 930, and continue the process.

Advancing to step 11:
309 can be fit into 930 3 times, resulting in a remainder of 3.
The next digit of our result is 3. 
Result so far: 233091.233
The remainder is 3 after subtracting 927 from 930.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Our division results in 233091.233 with a remaining 0.0003.