43524 ÷ 30 
The aim is to understand the frequency of 30 in 43524.

On to step 1:
If we divide 4 by 30, we get 0 and a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Grab the next digit (3) from the dividend, add it to 4, then carry on: 43 / 30

Moving on to step 2:
If we divide 43 by 30, we get 1 and a remainder of 13.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtracting 30 from 43 leaves us with 13.
Take the next digit (5) from the dividend and append it to 13, then repeat: 135 / 30

On to step 3:
The number 30 fits into 135 4 times, leaving a remainder of 15.
Use 4 as the next digit of our solution. 
Result so far: 14.0
Subtracting 120 from 135 leaves us with 15.
Bring next digit (2) of the dividend behind the 15 and repeat the process: 152 / 30

On to step 4:
When dividing 152 by 30, we get 5 with a remainder of 2.
Record the quotient 5 as the next digit in the result. 
Result so far: 145.0
Deduct 150 from 152 and we're left with 2.
Append the next digit (4) from the dividend to 2 and continue with: 24 / 30

Step 5:
The number 30 fits into 24 0 times, leaving a remainder of 24.
The number 0 becomes the next digit in our result. 
Result so far: 1450.0
Deduct 0 from 24 and we're left with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

On to step 6:
If we divide 240 by 30, we get 8 and a remainder of 0.
Write down 8 as next digit of the result. 
Result so far: 1450.8
Deduct 240 from 240 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 7:
If we divide 0 by 30, we get 0 and a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 1450.8
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 8:
The number 30 fits into 0 0 times, leaving a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 1450.8
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

After the division, we end up with 1450.8 and a remainder of 0.0.