428244 ÷ 45 
The aim is to understand the frequency of 45 in 428244.

On to step 1:
When dividing 4 by 45, we get 0 with a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Grab the next digit (2) from the dividend, add it to 4, then carry on: 42 / 45

Step 2:
45 goes into 42 0 times with a remainder of 42.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 42, we get 42.
Grab the next digit (8) from the dividend, add it to 42, then carry on: 428 / 45

Moving on to step 3:
428 divided by 45 is 9 with a remainder of 23.
The next digit of our result is 9. 
Result so far: 9.0
The remainder is 23 after subtracting 405 from 428.
Grab the next digit (2) from the dividend, add it to 23, then carry on: 232 / 45

Going ahead to step 4:
45 goes into 232 5 times with a remainder of 7.
Use 5 as the next digit of our solution. 
Result so far: 95.0
If we subtract 225 from 232, we get 7.
Bring next digit (4) of the dividend behind the 7 and repeat the process: 74 / 45

Step 5:
If we divide 74 by 45, we get 1 and a remainder of 29.
Record the quotient 1 as the next digit in the result. 
Result so far: 951.0
If we subtract 45 from 74, we get 29.
Include the next digit (4) from the dividend after 29, then repeat: 294 / 45

Let's proceed to step 6:
45 can be fit into 294 6 times, resulting in a remainder of 24.
Write down 6 as next digit of the result. 
Result so far: 9516.0
Subtracting 270 from 294 leaves us 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.

Step 7:
240 divided by 45 is 5 with a remainder of 15.
Put 5 as the next digit of the answer. 
Result so far: 9516.5
If we subtract 225 from 240, we 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 8:
45 goes into 150 3 times with a remainder of 15.
The next digit of our result is 3. 
Result so far: 9516.53
Subtracting 135 from 150 leaves us 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.

Going ahead to step 9:
45 goes into 150 3 times with a remainder of 15.
Record the quotient 3 as the next digit in the result. 
Result so far: 9516.533
Subtracting 135 from 150 leaves us 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.

After the division, we end up with 9516.533 and a remainder of 0.0015.