We're dividing 607681 by 45 
The aim is to understand the frequency of 45 in 607681.

Step 1:
6 divided by 45 is 0 with a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Bring next digit (0) of the dividend behind the 6 and repeat the process: 60 / 45

Let's proceed to step 2:
45 can be fit into 60 1 times, resulting in a remainder of 15.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtracting 45 from 60 leaves us with 15.
Append the next digit (7) from the dividend to 15 and continue with: 157 / 45

Going ahead to step 3:
The number 45 fits into 157 3 times, leaving a remainder of 22.
Write down 3 as next digit of the result. 
Result so far: 13.0
Subtracting 135 from 157 leaves us with 22.
Include the next digit (6) from the dividend after 22, then repeat: 226 / 45

On to step 4:
When dividing 226 by 45, we get 5 with a remainder of 1.
Use 5 as the next digit of our solution. 
Result so far: 135.0
Subtracting 225 from 226 leaves us with 1.
Fetch the next digit (8) from the dividend, attach it to 1 and continue: 18 / 45

Step 5:
If we divide 18 by 45, we get 0 and a remainder of 18.
Record the quotient 0 as the next digit in the result. 
Result so far: 1350.0
If we subtract 0 from 18, we get 18.
Take the next digit (1) from the dividend and append it to 18, then repeat: 181 / 45

On to step 6:
45 can be fit into 181 4 times, resulting in a remainder of 1.
Put 4 as the next digit of the answer. 
Result so far: 13504.0
If we take 180 away from 181, we end up with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

On to step 7:
The number 45 fits into 10 0 times, leaving a remainder of 10.
The number 0 becomes the next digit in our result. 
Result so far: 13504.0
If we subtract 0 from 10, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 8:
100 divided by 45 is 2 with a remainder of 10.
The next digit of our result is 2. 
Result so far: 13504.02
Deduct 90 from 100 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 9:
If we divide 100 by 45, we get 2 and a remainder of 10.
Use 2 as the next digit of our solution. 
Result so far: 13504.022
If we take 90 away from 100, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

The final result is 13504.022 with a remainder of 0.001.