We look at the division of 2488303 by 45 
The aim is to understand the frequency of 45 in 2488303.

Going ahead to step 1:
When dividing 2 by 45, we get 0 with a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Append the next digit (4) from the dividend to 2 and continue with: 24 / 45

Advancing to step 2:
The number 45 fits into 24 0 times, leaving a remainder of 24.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 24 after subtracting 0 from 24.
Grab the next digit (8) from the dividend, add it to 24, then carry on: 248 / 45

Step 3:
45 can be fit into 248 5 times, resulting in a remainder of 23.
Record the quotient 5 as the next digit in the result. 
Result so far: 5.0
If we subtract 225 from 248, we get 23.
Grab the next digit (8) from the dividend, add it to 23, then carry on: 238 / 45

Advancing to step 4:
238 divided by 45 is 5 with a remainder of 13.
Use 5 as the next digit of our solution. 
Result so far: 55.0
If we take 225 away from 238, we end up with 13.
Include the next digit (3) from the dividend after 13, then repeat: 133 / 45

Step 5:
133 divided by 45 is 2 with a remainder of 43.
The number 2 becomes the next digit in our result. 
Result so far: 552.0
Subtract 90 from 133 to get 43.
Include the next digit (0) from the dividend after 43, then repeat: 430 / 45

Going ahead to step 6:
When dividing 430 by 45, we get 9 with a remainder of 25.
Record the quotient 9 as the next digit in the result. 
Result so far: 5529.0
Subtract 405 from 430 to get 25.
Include the next digit (3) from the dividend after 25, then repeat: 253 / 45

Advancing to step 7:
When dividing 253 by 45, we get 5 with a remainder of 28.
The next digit of our result is 5. 
Result so far: 55295.0
If we subtract 225 from 253, we get 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Advancing to step 8:
45 can be fit into 280 6 times, resulting in a remainder of 10.
The next digit of our result is 6. 
Result so far: 55295.6
The remainder is 10 after subtracting 270 from 280.
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 9:
45 can be fit into 100 2 times, resulting in a remainder of 10.
Put 2 as the next digit of the answer. 
Result so far: 55295.62
If we subtract 90 from 100, 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.

Step 10:
45 goes into 100 2 times with a remainder of 10.
Record the quotient 2 as the next digit in the result. 
Result so far: 55295.622
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.

The final outcome is 55295.622, with a leftover of 0.001.