874309 ÷ 45 
The aim is to understand the frequency of 45 in 874309.

On to step 1:
45 goes into 8 0 times with a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Take the next digit (7) from the dividend and append it to 8, then repeat: 87 / 45

Let's proceed to step 2:
45 goes into 87 1 times with a remainder of 42.
The next digit of our result is 1. 
Result so far: 1.0
If we subtract 45 from 87, we get 42.
Include the next digit (4) from the dividend after 42, then repeat: 424 / 45

Moving on to step 3:
45 goes into 424 9 times with a remainder of 19.
Write down 9 as next digit of the result. 
Result so far: 19.0
If we take 405 away from 424, we end up with 19.
Append the next digit (3) from the dividend to 19 and continue with: 193 / 45

Going ahead to step 4:
193 divided by 45 is 4 with a remainder of 13.
Use 4 as the next digit of our solution. 
Result so far: 194.0
Subtracting 180 from 193 leaves us with 13.
Append the next digit (0) from the dividend to 13 and continue with: 130 / 45

Advancing to step 5:
45 can be fit into 130 2 times, resulting in a remainder of 40.
Put 2 as the next digit of the answer. 
Result so far: 1942.0
Deduct 90 from 130 and we're left with 40.
Include the next digit (9) from the dividend after 40, then repeat: 409 / 45

Step 6:
The number 45 fits into 409 9 times, leaving a remainder of 4.
Use 9 as the next digit of our solution. 
Result so far: 19429.0
If we subtract 405 from 409, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Going ahead to step 7:
40 divided by 45 is 0 with a remainder of 40.
Record the quotient 0 as the next digit in the result. 
Result so far: 19429.0
Subtracting 0 from 40 leaves us with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Let's proceed to step 8:
When dividing 400 by 45, we get 8 with a remainder of 40.
The number 8 becomes the next digit in our result. 
Result so far: 19429.08
Subtracting 360 from 400 leaves us with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Step 9:
400 divided by 45 is 8 with a remainder of 40.
Write down 8 as next digit of the result. 
Result so far: 19429.088
Subtract 360 from 400 to get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

The final result is 19429.088 with a remainder of 0.004.