We look at the division of 439549 by 45 
The aim is to understand the frequency of 45 in 439549.

Step 1:
The number 45 fits into 4 0 times, leaving a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Bring next digit (3) of the dividend behind the 4 and repeat the process: 43 / 45

Moving on to step 2:
The number 45 fits into 43 0 times, leaving a remainder of 43.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 43 to get 43.
Fetch the next digit (9) from the dividend, attach it to 43 and continue: 439 / 45

Going ahead to step 3:
439 divided by 45 is 9 with a remainder of 34.
Write down 9 as next digit of the result. 
Result so far: 9.0
The remainder is 34 after subtracting 405 from 439.
Grab the next digit (5) from the dividend, add it to 34, then carry on: 345 / 45

Moving on to step 4:
If we divide 345 by 45, we get 7 and a remainder of 30.
Record the quotient 7 as the next digit in the result. 
Result so far: 97.0
Subtracting 315 from 345 leaves us with 30.
Include the next digit (4) from the dividend after 30, then repeat: 304 / 45

Advancing to step 5:
When dividing 304 by 45, we get 6 with a remainder of 34.
The number 6 becomes the next digit in our result. 
Result so far: 976.0
Subtracting 270 from 304 leaves us with 34.
Grab the next digit (9) from the dividend, add it to 34, then carry on: 349 / 45

Step 6:
45 can be fit into 349 7 times, resulting in a remainder of 34.
Write down 7 as next digit of the result. 
Result so far: 9767.0
Subtracting 315 from 349 leaves us with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

On to step 7:
45 goes into 340 7 times with a remainder of 25.
The number 7 becomes the next digit in our result. 
Result so far: 9767.7
Subtracting 315 from 340 leaves us with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Going ahead to step 8:
45 goes into 250 5 times with a remainder of 25.
Write down 5 as next digit of the result. 
Result so far: 9767.75
Subtract 225 from 250 to get 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Step 9:
When dividing 250 by 45, we get 5 with a remainder of 25.
The number 5 becomes the next digit in our result. 
Result so far: 9767.755
If we take 225 away from 250, we end up with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

After the division, we end up with 9767.755 and a remainder of 0.0025.