We're dividing 26021521 by 30 
The aim is to understand the frequency of 30 in 26021521.

On to step 1:
30 goes into 2 0 times with a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Include the next digit (6) from the dividend after 2, then repeat: 26 / 30

Moving on to step 2:
If we divide 26 by 30, we get 0 and a remainder of 26.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 26, we end up with 26.
Take the next digit (0) from the dividend and append it to 26, then repeat: 260 / 30

Advancing to step 3:
The number 30 fits into 260 8 times, leaving a remainder of 20.
The next digit of our result is 8. 
Result so far: 8.0
If we take 240 away from 260, we end up with 20.
Fetch the next digit (2) from the dividend, attach it to 20 and continue: 202 / 30

Let's proceed to step 4:
30 can be fit into 202 6 times, resulting in a remainder of 22.
Use 6 as the next digit of our solution. 
Result so far: 86.0
Deduct 180 from 202 and we're left with 22.
Append the next digit (1) from the dividend to 22 and continue with: 221 / 30

On to step 5:
221 divided by 30 is 7 with a remainder of 11.
Put 7 as the next digit of the answer. 
Result so far: 867.0
Subtracting 210 from 221 leaves us with 11.
Grab the next digit (5) from the dividend, add it to 11, then carry on: 115 / 30

Let's proceed to step 6:
The number 30 fits into 115 3 times, leaving a remainder of 25.
Write down 3 as next digit of the result. 
Result so far: 8673.0
Subtracting 90 from 115 leaves us with 25.
Fetch the next digit (2) from the dividend, attach it to 25 and continue: 252 / 30

Let's proceed to step 7:
If we divide 252 by 30, we get 8 and a remainder of 12.
Write down 8 as next digit of the result. 
Result so far: 86738.0
Deduct 240 from 252 and we're left with 12.
Append the next digit (1) from the dividend to 12 and continue with: 121 / 30

Going ahead to step 8:
If we divide 121 by 30, we get 4 and a remainder of 1.
Write down 4 as next digit of the result. 
Result so far: 867384.0
If we subtract 120 from 121, we get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Moving on to step 9:
30 can be fit into 10 0 times, resulting in a remainder of 10.
Record the quotient 0 as the next digit in the result. 
Result so far: 867384.0
If we subtract 0 from 10, we get 10.
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 10:
100 divided by 30 is 3 with a remainder of 10.
The next digit of our result is 3. 
Result so far: 867384.03
Subtract 90 from 100 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 11:
30 goes into 100 3 times with a remainder of 10.
The number 3 becomes the next digit in our result. 
Result so far: 867384.033
If we take 90 away from 100, we end up 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 867384.033 with a remaining 0.001.