We're dividing 290418 by 45 
The aim is to understand the frequency of 45 in 290418.

On to step 1:
2 divided by 45 is 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 (9) from the dividend to 2 and continue with: 29 / 45

Let's proceed to step 2:
If we divide 29 by 45, we get 0 and a remainder of 29.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 29 to get 29.
Grab the next digit (0) from the dividend, add it to 29, then carry on: 290 / 45

On to step 3:
45 goes into 290 6 times with a remainder of 20.
The number 6 becomes the next digit in our result. 
Result so far: 6.0
If we subtract 270 from 290, we get 20.
Bring next digit (4) of the dividend behind the 20 and repeat the process: 204 / 45

Going ahead to step 4:
204 divided by 45 is 4 with a remainder of 24.
Use 4 as the next digit of our solution. 
Result so far: 64.0
The remainder is 24 after subtracting 180 from 204.
Take the next digit (1) from the dividend and append it to 24, then repeat: 241 / 45

Moving on to step 5:
45 can be fit into 241 5 times, resulting in a remainder of 16.
The next digit of our result is 5. 
Result so far: 645.0
If we take 225 away from 241, we end up with 16.
Grab the next digit (8) from the dividend, add it to 16, then carry on: 168 / 45

On to step 6:
45 can be fit into 168 3 times, resulting in a remainder of 33.
Record the quotient 3 as the next digit in the result. 
Result so far: 6453.0
Deduct 135 from 168 and we're left with 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Step 7:
If we divide 330 by 45, we get 7 and a remainder of 15.
Write down 7 as next digit of the result. 
Result so far: 6453.7
If we subtract 315 from 330, 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:
When dividing 150 by 45, we get 3 with a remainder of 15.
The next digit of our result is 3. 
Result so far: 6453.73
If we take 135 away from 150, we end up 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.

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: 6453.733
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.

The final result is 6453.733 with a remainder of 0.0015.