420324 ÷ 45 
The aim is to understand the frequency of 45 in 420324.

Step 1:
45 goes into 4 0 times with a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Include the next digit (2) from the dividend after 4, then repeat: 42 / 45

Step 2:
The number 45 fits into 42 0 times, leaving a remainder of 42.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 42 and we're left with 42.
Bring next digit (0) of the dividend behind the 42 and repeat the process: 420 / 45

Advancing to step 3:
45 can be fit into 420 9 times, resulting in a remainder of 15.
Use 9 as the next digit of our solution. 
Result so far: 9.0
Deduct 405 from 420 and we're left with 15.
Bring next digit (3) of the dividend behind the 15 and repeat the process: 153 / 45

Advancing to step 4:
153 divided by 45 is 3 with a remainder of 18.
Write down 3 as next digit of the result. 
Result so far: 93.0
Deduct 135 from 153 and we're left with 18.
Grab the next digit (2) from the dividend, add it to 18, then carry on: 182 / 45

Going ahead to step 5:
45 can be fit into 182 4 times, resulting in a remainder of 2.
Write down 4 as next digit of the result. 
Result so far: 934.0
The remainder is 2 after subtracting 180 from 182.
Append the next digit (4) from the dividend to 2 and continue with: 24 / 45

Moving on to step 6:
45 goes into 24 0 times with a remainder of 24.
Record the quotient 0 as the next digit in the result. 
Result so far: 9340.0
If we subtract 0 from 24, we get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Let's proceed to step 7:
45 can be fit into 240 5 times, resulting in a remainder of 15.
Use 5 as the next digit of our solution. 
Result so far: 9340.5
Subtract 225 from 240 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.

Going ahead to step 8:
The number 45 fits into 150 3 times, leaving a remainder of 15.
The number 3 becomes the next digit in our result. 
Result so far: 9340.53
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.

Let's proceed to step 9:
150 divided by 45 is 3 with a remainder of 15.
The number 3 becomes the next digit in our result. 
Result so far: 9340.533
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.

After the division, we end up with 9340.533 and a remainder of 0.0015.