12809353 ÷ 30 
The aim is to understand the frequency of 30 in 12809353.

Moving on to step 1:
When dividing 1 by 30, we get 0 with a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Append the next digit (2) from the dividend to 1 and continue with: 12 / 30

Step 2:
If we divide 12 by 30, we get 0 and a remainder of 12.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 12 after subtracting 0 from 12.
Grab the next digit (8) from the dividend, add it to 12, then carry on: 128 / 30

Let's proceed to step 3:
30 goes into 128 4 times with a remainder of 8.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
If we take 120 away from 128, we end up with 8.
Bring next digit (0) of the dividend behind the 8 and repeat the process: 80 / 30

Step 4:
30 can be fit into 80 2 times, resulting in a remainder of 20.
Record the quotient 2 as the next digit in the result. 
Result so far: 42.0
Deduct 60 from 80 and we're left with 20.
Take the next digit (9) from the dividend and append it to 20, then repeat: 209 / 30

Advancing to step 5:
30 goes into 209 6 times with a remainder of 29.
The number 6 becomes the next digit in our result. 
Result so far: 426.0
Subtracting 180 from 209 leaves us with 29.
Append the next digit (3) from the dividend to 29 and continue with: 293 / 30

Let's proceed to step 6:
If we divide 293 by 30, we get 9 and a remainder of 23.
Write down 9 as next digit of the result. 
Result so far: 4269.0
The remainder is 23 after subtracting 270 from 293.
Append the next digit (5) from the dividend to 23 and continue with: 235 / 30

Let's proceed to step 7:
The number 30 fits into 235 7 times, leaving a remainder of 25.
Put 7 as the next digit of the answer. 
Result so far: 42697.0
Subtracting 210 from 235 leaves us with 25.
Grab the next digit (3) from the dividend, add it to 25, then carry on: 253 / 30

Going ahead to step 8:
30 goes into 253 8 times with a remainder of 13.
The number 8 becomes the next digit in our result. 
Result so far: 426978.0
The remainder is 13 after subtracting 240 from 253.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Moving on to step 9:
30 goes into 130 4 times with a remainder of 10.
Record the quotient 4 as the next digit in the result. 
Result so far: 426978.4
Subtracting 120 from 130 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 10:
100 divided by 30 is 3 with a remainder of 10.
Use 3 as the next digit of our solution. 
Result so far: 426978.43
The remainder is 10 after subtracting 90 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 11:
100 divided by 30 is 3 with a remainder of 10.
Use 3 as the next digit of our solution. 
Result so far: 426978.433
Subtracting 90 from 100 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Our division results in 426978.433 with a remaining 0.001.