4091 ÷ 45 
The aim is to understand the frequency of 45 in 4091.

Moving on to step 1:
4 divided by 45 is 0 with a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Bring next digit (0) of the dividend behind the 4 and repeat the process: 40 / 45

Advancing to step 2:
45 goes into 40 0 times with a remainder of 40.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 40 to get 40.
Grab the next digit (9) from the dividend, add it to 40, then carry on: 409 / 45

Moving on to step 3:
45 can be fit into 409 9 times, resulting in a remainder of 4.
The number 9 becomes the next digit in our result. 
Result so far: 9.0
If we take 405 away from 409, we end up with 4.
Take the next digit (1) from the dividend and append it to 4, then repeat: 41 / 45

Going ahead to step 4:
The number 45 fits into 41 0 times, leaving a remainder of 41.
Record the quotient 0 as the next digit in the result. 
Result so far: 90.0
Subtract 0 from 41 to get 41.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

On to step 5:
If we divide 410 by 45, we get 9 and a remainder of 5.
Write down 9 as next digit of the result. 
Result so far: 90.9
If we take 405 away from 410, we end up 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.

Let's proceed to step 6:
50 divided by 45 is 1 with a remainder of 5.
The number 1 becomes the next digit in our result. 
Result so far: 90.91
If we subtract 45 from 50, we get 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:
45 goes into 50 1 times with a remainder of 5.
Record the quotient 1 as the next digit in the result. 
Result so far: 90.911
If we take 45 away from 50, we end up 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.

In conclusion, the division gives 90.911 with a balance of 0.0005.