We look at the division of 624990 by 45 
The aim is to understand the frequency of 45 in 624990.

Let's proceed to step 1:
45 can be fit into 6 0 times, resulting in a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Include the next digit (2) from the dividend after 6, then repeat: 62 / 45

On to step 2:
62 divided by 45 is 1 with a remainder of 17.
Write down 1 as next digit of the result. 
Result so far: 1.0
The remainder is 17 after subtracting 45 from 62.
Grab the next digit (4) from the dividend, add it to 17, then carry on: 174 / 45

Step 3:
45 can be fit into 174 3 times, resulting in a remainder of 39.
Write down 3 as next digit of the result. 
Result so far: 13.0
Subtracting 135 from 174 leaves us with 39.
Append the next digit (9) from the dividend to 39 and continue with: 399 / 45

Moving on to step 4:
When dividing 399 by 45, we get 8 with a remainder of 39.
The next digit of our result is 8. 
Result so far: 138.0
Subtracting 360 from 399 leaves us with 39.
Bring next digit (9) of the dividend behind the 39 and repeat the process: 399 / 45

Step 5:
If we divide 399 by 45, we get 8 and a remainder of 39.
Put 8 as the next digit of the answer. 
Result so far: 1388.0
If we subtract 360 from 399, we get 39.
Bring next digit (0) of the dividend behind the 39 and repeat the process: 390 / 45

On to step 6:
45 can be fit into 390 8 times, resulting in a remainder of 30.
Record the quotient 8 as the next digit in the result. 
Result so far: 13888.0
Subtract 360 from 390 to get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Going ahead to step 7:
When dividing 300 by 45, we get 6 with a remainder of 30.
Use 6 as the next digit of our solution. 
Result so far: 13888.6
Subtract 270 from 300 to get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Step 8:
When dividing 300 by 45, we get 6 with a remainder of 30.
The next digit of our result is 6. 
Result so far: 13888.66
Deduct 270 from 300 and we're left with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

In conclusion, the division gives 13888.66 with a balance of 0.03.