We're dividing 13549787 by 309 
The aim is to understand the frequency of 309 in 13549787.

Going ahead to step 1:
1 divided by 309 is 0 with a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Fetch the next digit (3) from the dividend, attach it to 1 and continue: 13 / 309

Let's proceed to step 2:
309 goes into 13 0 times with a remainder of 13.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 13 and we're left with 13.
Grab the next digit (5) from the dividend, add it to 13, then carry on: 135 / 309

Step 3:
When dividing 135 by 309, we get 0 with a remainder of 135.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 135 to get 135.
Take the next digit (4) from the dividend and append it to 135, then repeat: 1354 / 309

Let's proceed to step 4:
The number 309 fits into 1354 4 times, leaving a remainder of 118.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
If we subtract 1236 from 1354, we get 118.
Fetch the next digit (9) from the dividend, attach it to 118 and continue: 1189 / 309

Moving on to step 5:
309 goes into 1189 3 times with a remainder of 262.
Write down 3 as next digit of the result. 
Result so far: 43.0
Subtract 927 from 1189 to get 262.
Grab the next digit (7) from the dividend, add it to 262, then carry on: 2627 / 309

Step 6:
The number 309 fits into 2627 8 times, leaving a remainder of 155.
Record the quotient 8 as the next digit in the result. 
Result so far: 438.0
Subtract 2472 from 2627 to get 155.
Append the next digit (8) from the dividend to 155 and continue with: 1558 / 309

Going ahead to step 7:
1558 divided by 309 is 5 with a remainder of 13.
The number 5 becomes the next digit in our result. 
Result so far: 4385.0
Subtracting 1545 from 1558 leaves us with 13.
Include the next digit (7) from the dividend after 13, then repeat: 137 / 309

Going ahead to step 8:
When dividing 137 by 309, we get 0 with a remainder of 137.
Record the quotient 0 as the next digit in the result. 
Result so far: 43850.0
Subtracting 0 from 137 leaves us with 137.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1370, and continue the process.

Moving on to step 9:
309 goes into 1370 4 times with a remainder of 134.
Use 4 as the next digit of our solution. 
Result so far: 43850.4
The remainder is 134 after subtracting 1236 from 1370.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1340, and continue the process.

Advancing to step 10:
If we divide 1340 by 309, we get 4 and a remainder of 104.
Use 4 as the next digit of our solution. 
Result so far: 43850.44
Subtracting 1236 from 1340 leaves us with 104.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1040, and continue the process.

The final result is 43850.44 with a remainder of 0.104.