We're dividing 74124194 by 309 
The aim is to understand the frequency of 309 in 74124194.

Moving on to step 1:
When dividing 7 by 309, we get 0 with a remainder of 7.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Include the next digit (4) from the dividend after 7, then repeat: 74 / 309

Advancing to step 2:
When dividing 74 by 309, we get 0 with a remainder of 74.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 74 leaves us with 74.
Fetch the next digit (1) from the dividend, attach it to 74 and continue: 741 / 309

Going ahead to step 3:
If we divide 741 by 309, we get 2 and a remainder of 123.
Put 2 as the next digit of the answer. 
Result so far: 2.0
If we take 618 away from 741, we end up with 123.
Fetch the next digit (2) from the dividend, attach it to 123 and continue: 1232 / 309

Going ahead to step 4:
The number 309 fits into 1232 3 times, leaving a remainder of 305.
Put 3 as the next digit of the answer. 
Result so far: 23.0
If we subtract 927 from 1232, we get 305.
Grab the next digit (4) from the dividend, add it to 305, then carry on: 3054 / 309

Advancing to step 5:
3054 divided by 309 is 9 with a remainder of 273.
Record the quotient 9 as the next digit in the result. 
Result so far: 239.0
Subtracting 2781 from 3054 leaves us with 273.
Include the next digit (1) from the dividend after 273, then repeat: 2731 / 309

Advancing to step 6:
When dividing 2731 by 309, we get 8 with a remainder of 259.
The next digit of our result is 8. 
Result so far: 2398.0
Deduct 2472 from 2731 and we're left with 259.
Grab the next digit (9) from the dividend, add it to 259, then carry on: 2599 / 309

Going ahead to step 7:
If we divide 2599 by 309, we get 8 and a remainder of 127.
Write down 8 as next digit of the result. 
Result so far: 23988.0
Subtract 2472 from 2599 to get 127.
Grab the next digit (4) from the dividend, add it to 127, then carry on: 1274 / 309

Let's proceed to step 8:
When dividing 1274 by 309, we get 4 with a remainder of 38.
Put 4 as the next digit of the answer. 
Result so far: 239884.0
Subtract 1236 from 1274 to get 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 9:
If we divide 380 by 309, we get 1 and a remainder of 71.
The next digit of our result is 1. 
Result so far: 239884.1
The remainder is 71 after subtracting 309 from 380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

On to step 10:
710 divided by 309 is 2 with a remainder of 92.
The number 2 becomes the next digit in our result. 
Result so far: 239884.12
Subtract 618 from 710 to get 92.
Since there are no more digits in the dividend, we add a zero to the remainder making it 920, and continue the process.

Step 11:
309 can be fit into 920 2 times, resulting in a remainder of 302.
Use 2 as the next digit of our solution. 
Result so far: 239884.122
If we take 618 away from 920, we end up with 302.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3020, and continue the process.

The final outcome is 239884.122, with a leftover of 0.0302.