840245 ÷ 45 
The aim is to understand the frequency of 45 in 840245.

Let's proceed to step 1:
8 divided by 45 is 0 with a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Include the next digit (4) from the dividend after 8, then repeat: 84 / 45

Advancing to step 2:
The number 45 fits into 84 1 times, leaving a remainder of 39.
The next digit of our result is 1. 
Result so far: 1.0
Subtract 45 from 84 to get 39.
Bring next digit (0) of the dividend behind the 39 and repeat the process: 390 / 45

Moving on to step 3:
If we divide 390 by 45, we get 8 and a remainder of 30.
Put 8 as the next digit of the answer. 
Result so far: 18.0
If we subtract 360 from 390, we get 30.
Append the next digit (2) from the dividend to 30 and continue with: 302 / 45

Let's proceed to step 4:
302 divided by 45 is 6 with a remainder of 32.
Write down 6 as next digit of the result. 
Result so far: 186.0
Deduct 270 from 302 and we're left with 32.
Bring next digit (4) of the dividend behind the 32 and repeat the process: 324 / 45

Let's proceed to step 5:
45 can be fit into 324 7 times, resulting in a remainder of 9.
Use 7 as the next digit of our solution. 
Result so far: 1867.0
Subtracting 315 from 324 leaves us with 9.
Include the next digit (5) from the dividend after 9, then repeat: 95 / 45

Going ahead to step 6:
When dividing 95 by 45, we get 2 with a remainder of 5.
The next digit of our result is 2. 
Result so far: 18672.0
If we take 90 away from 95, we end up with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Step 7:
45 can be fit into 50 1 times, resulting in a remainder of 5.
Write down 1 as next digit of the result. 
Result so far: 18672.1
Subtracting 45 from 50 leaves us with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Advancing to step 8:
45 goes into 50 1 times with a remainder of 5.
The next digit of our result is 1. 
Result so far: 18672.11
Subtracting 45 from 50 leaves us with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

The final outcome is 18672.11, with a leftover of 0.005.