320405 divided by 45 
The aim is to understand the frequency of 45 in 320405.

Step 1:
45 goes into 3 0 times with a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Include the next digit (2) from the dividend after 3, then repeat: 32 / 45

Step 2:
32 divided by 45 is 0 with a remainder of 32.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 32, we end up with 32.
Append the next digit (0) from the dividend to 32 and continue with: 320 / 45

Step 3:
45 can be fit into 320 7 times, resulting in a remainder of 5.
The next digit of our result is 7. 
Result so far: 7.0
The remainder is 5 after subtracting 315 from 320.
Bring next digit (4) of the dividend behind the 5 and repeat the process: 54 / 45

Moving on to step 4:
If we divide 54 by 45, we get 1 and a remainder of 9.
Record the quotient 1 as the next digit in the result. 
Result so far: 71.0
Subtract 45 from 54 to get 9.
Grab the next digit (0) from the dividend, add it to 9, then carry on: 90 / 45

Going ahead to step 5:
The number 45 fits into 90 2 times, leaving a remainder of 0.
Put 2 as the next digit of the answer. 
Result so far: 712.0
Subtracting 90 from 90 leaves us with 0.
Append the next digit (5) from the dividend to 0 and continue with: 5 / 45

Step 6:
5 divided by 45 is 0 with a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 7120.0
The remainder is 5 after subtracting 0 from 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 7:
50 divided by 45 is 1 with a remainder of 5.
Record the quotient 1 as the next digit in the result. 
Result so far: 7120.1
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:
50 divided by 45 is 1 with a remainder of 5.
Put 1 as the next digit of the answer. 
Result so far: 7120.11
Deduct 45 from 50 and we're left 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 result is 7120.11 with a remainder of 0.005.