Let's divide 725109 by 45
The aim is to understand the frequency of 45 in 725109.

Moving on to step 1:
If we divide 7 by 45, we get 0 and a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Append the next digit (2) from the dividend to 7 and continue with: 72 / 45

Step 2:
The number 45 fits into 72 1 times, leaving a remainder of 27.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Deduct 45 from 72 and we're left with 27.
Append the next digit (5) from the dividend to 27 and continue with: 275 / 45

On to step 3:
When dividing 275 by 45, we get 6 with a remainder of 5.
The next digit of our result is 6. 
Result so far: 16.0
Deduct 270 from 275 and we're left with 5.
Include the next digit (1) from the dividend after 5, then repeat: 51 / 45

Going ahead to step 4:
The number 45 fits into 51 1 times, leaving a remainder of 6.
Put 1 as the next digit of the answer. 
Result so far: 161.0
Subtract 45 from 51 to get 6.
Fetch the next digit (0) from the dividend, attach it to 6 and continue: 60 / 45

Moving on to step 5:
The number 45 fits into 60 1 times, leaving a remainder of 15.
The number 1 becomes the next digit in our result. 
Result so far: 1611.0
Subtract 45 from 60 to get 15.
Grab the next digit (9) from the dividend, add it to 15, then carry on: 159 / 45

Step 6:
45 can be fit into 159 3 times, resulting in a remainder of 24.
Write down 3 as next digit of the result. 
Result so far: 16113.0
Deduct 135 from 159 and we're left 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.

Let's proceed to step 7:
If we divide 240 by 45, we get 5 and a remainder of 15.
Record the quotient 5 as the next digit in the result. 
Result so far: 16113.5
Subtracting 225 from 240 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 8:
150 divided by 45 is 3 with a remainder of 15.
Record the quotient 3 as the next digit in the result. 
Result so far: 16113.53
If we subtract 135 from 150, 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.

Moving on to step 9:
45 can be fit into 150 3 times, resulting in a remainder of 15.
The number 3 becomes the next digit in our result. 
Result so far: 16113.533
The remainder is 15 after subtracting 135 from 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Our division results in 16113.533 with a remaining 0.0015.