375523 divided by 45 
The aim is to understand the frequency of 45 in 375523.

Going ahead to step 1:
When dividing 3 by 45, we get 0 with a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Include the next digit (7) from the dividend after 3, then repeat: 37 / 45

Going ahead to step 2:
45 goes into 37 0 times with a remainder of 37.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 37, we end up with 37.
Grab the next digit (5) from the dividend, add it to 37, then carry on: 375 / 45

Advancing to step 3:
45 goes into 375 8 times with a remainder of 15.
Write down 8 as next digit of the result. 
Result so far: 8.0
The remainder is 15 after subtracting 360 from 375.
Include the next digit (5) from the dividend after 15, then repeat: 155 / 45

Step 4:
When dividing 155 by 45, we get 3 with a remainder of 20.
Use 3 as the next digit of our solution. 
Result so far: 83.0
Subtract 135 from 155 to get 20.
Include the next digit (2) from the dividend after 20, then repeat: 202 / 45

Step 5:
45 can be fit into 202 4 times, resulting in a remainder of 22.
Write down 4 as next digit of the result. 
Result so far: 834.0
The remainder is 22 after subtracting 180 from 202.
Take the next digit (3) from the dividend and append it to 22, then repeat: 223 / 45

On to step 6:
When dividing 223 by 45, we get 4 with a remainder of 43.
Use 4 as the next digit of our solution. 
Result so far: 8344.0
Subtract 180 from 223 to get 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Going ahead to step 7:
If we divide 430 by 45, we get 9 and a remainder of 25.
Put 9 as the next digit of the answer. 
Result so far: 8344.9
If we subtract 405 from 430, we get 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Let's proceed to step 8:
If we divide 250 by 45, we get 5 and a remainder of 25.
The next digit of our result is 5. 
Result so far: 8344.95
Deduct 225 from 250 and we're left with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Going ahead to step 9:
45 goes into 250 5 times with a remainder of 25.
The number 5 becomes the next digit in our result. 
Result so far: 8344.955
If we take 225 away from 250, we end up with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

After the division, we end up with 8344.955 and a remainder of 0.0025.