We look at the division of 300615 by 45 
The aim is to understand the frequency of 45 in 300615.

Moving on to step 1:
3 divided by 45 is 0 with a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Include the next digit (0) from the dividend after 3, then repeat: 30 / 45

Let's proceed to step 2:
45 goes into 30 0 times with a remainder of 30.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 30 and we're left with 30.
Include the next digit (0) from the dividend after 30, then repeat: 300 / 45

Moving on to step 3:
The number 45 fits into 300 6 times, leaving a remainder of 30.
Use 6 as the next digit of our solution. 
Result so far: 6.0
If we take 270 away from 300, we end up with 30.
Fetch the next digit (6) from the dividend, attach it to 30 and continue: 306 / 45

Step 4:
45 goes into 306 6 times with a remainder of 36.
Put 6 as the next digit of the answer. 
Result so far: 66.0
Deduct 270 from 306 and we're left with 36.
Fetch the next digit (1) from the dividend, attach it to 36 and continue: 361 / 45

Step 5:
45 can be fit into 361 8 times, resulting in a remainder of 1.
Use 8 as the next digit of our solution. 
Result so far: 668.0
If we take 360 away from 361, we end up with 1.
Append the next digit (5) from the dividend to 1 and continue with: 15 / 45

Advancing to step 6:
The number 45 fits into 15 0 times, leaving a remainder of 15.
Put 0 as the next digit of the answer. 
Result so far: 6680.0
Deduct 0 from 15 and we're left with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Advancing to step 7:
45 can be fit into 150 3 times, resulting in a remainder of 15.
The number 3 becomes the next digit in our result. 
Result so far: 6680.3
Subtract 135 from 150 to get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Step 8:
If we divide 150 by 45, we get 3 and a remainder of 15.
Record the quotient 3 as the next digit in the result. 
Result so far: 6680.33
If we take 135 away from 150, we end up with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Our division results in 6680.33 with a remaining 0.015.