We're dividing 79523948 by 309 
The aim is to understand the frequency of 309 in 79523948.

Moving on to step 1:
When dividing 7 by 309, we get 0 with a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Take the next digit (9) from the dividend and append it to 7, then repeat: 79 / 309

Let's proceed to step 2:
309 goes into 79 0 times with a remainder of 79.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 79 to get 79.
Bring next digit (5) of the dividend behind the 79 and repeat the process: 795 / 309

On to step 3:
795 divided by 309 is 2 with a remainder of 177.
The next digit of our result is 2. 
Result so far: 2.0
The remainder is 177 after subtracting 618 from 795.
Append the next digit (2) from the dividend to 177 and continue with: 1772 / 309

Let's proceed to step 4:
If we divide 1772 by 309, we get 5 and a remainder of 227.
The next digit of our result is 5. 
Result so far: 25.0
The remainder is 227 after subtracting 1545 from 1772.
Include the next digit (3) from the dividend after 227, then repeat: 2273 / 309

Advancing to step 5:
2273 divided by 309 is 7 with a remainder of 110.
The number 7 becomes the next digit in our result. 
Result so far: 257.0
Subtracting 2163 from 2273 leaves us with 110.
Grab the next digit (9) from the dividend, add it to 110, then carry on: 1109 / 309

On to step 6:
309 can be fit into 1109 3 times, resulting in a remainder of 182.
Record the quotient 3 as the next digit in the result. 
Result so far: 2573.0
Subtracting 927 from 1109 leaves us with 182.
Grab the next digit (4) from the dividend, add it to 182, then carry on: 1824 / 309

Let's proceed to step 7:
309 can be fit into 1824 5 times, resulting in a remainder of 279.
Put 5 as the next digit of the answer. 
Result so far: 25735.0
The remainder is 279 after subtracting 1545 from 1824.
Grab the next digit (8) from the dividend, add it to 279, then carry on: 2798 / 309

Step 8:
When dividing 2798 by 309, we get 9 with a remainder of 17.
Record the quotient 9 as the next digit in the result. 
Result so far: 257359.0
The remainder is 17 after subtracting 2781 from 2798.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Step 9:
If we divide 170 by 309, we get 0 and a remainder of 170.
The next digit of our result is 0. 
Result so far: 257359.0
If we take 0 away from 170, we end up with 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1700, and continue the process.

Let's proceed to step 10:
When dividing 1700 by 309, we get 5 with a remainder of 155.
Record the quotient 5 as the next digit in the result. 
Result so far: 257359.05
Subtracting 1545 from 1700 leaves us with 155.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1550, and continue the process.

Moving on to step 11:
309 goes into 1550 5 times with a remainder of 5.
The next digit of our result is 5. 
Result so far: 257359.055
Deduct 1545 from 1550 and we're left with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

After the division, we end up with 257359.055 and a remainder of 0.0005.