We're dividing 15953523 by 45 
The aim is to understand the frequency of 45 in 15953523.

Going ahead to step 1:
The number 45 fits into 1 0 times, leaving a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Include the next digit (5) from the dividend after 1, then repeat: 15 / 45

Moving on to step 2:
15 divided by 45 is 0 with a remainder of 15.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 15, we get 15.
Grab the next digit (9) from the dividend, add it to 15, then carry on: 159 / 45

Moving on to step 3:
45 can be fit into 159 3 times, resulting in a remainder of 24.
The next digit of our result is 3. 
Result so far: 3.0
Deduct 135 from 159 and we're left with 24.
Grab the next digit (5) from the dividend, add it to 24, then carry on: 245 / 45

Going ahead to step 4:
When dividing 245 by 45, we get 5 with a remainder of 20.
The next digit of our result is 5. 
Result so far: 35.0
Subtracting 225 from 245 leaves us with 20.
Grab the next digit (3) from the dividend, add it to 20, then carry on: 203 / 45

Moving on to step 5:
When dividing 203 by 45, we get 4 with a remainder of 23.
Use 4 as the next digit of our solution. 
Result so far: 354.0
Subtracting 180 from 203 leaves us with 23.
Append the next digit (5) from the dividend to 23 and continue with: 235 / 45

Going ahead to step 6:
45 can be fit into 235 5 times, resulting in a remainder of 10.
Write down 5 as next digit of the result. 
Result so far: 3545.0
If we subtract 225 from 235, we get 10.
Include the next digit (2) from the dividend after 10, then repeat: 102 / 45

Advancing to step 7:
45 goes into 102 2 times with a remainder of 12.
The next digit of our result is 2. 
Result so far: 35452.0
If we take 90 away from 102, we end up with 12.
Grab the next digit (3) from the dividend, add it to 12, then carry on: 123 / 45

Let's proceed to step 8:
When dividing 123 by 45, we get 2 with a remainder of 33.
Write down 2 as next digit of the result. 
Result so far: 354522.0
Subtract 90 from 123 to get 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Step 9:
If we divide 330 by 45, we get 7 and a remainder of 15.
Write down 7 as next digit of the result. 
Result so far: 354522.7
Subtract 315 from 330 to get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Advancing to step 10:
45 goes into 150 3 times with a remainder of 15.
The next digit of our result is 3. 
Result so far: 354522.73
The remainder is 15 after subtracting 135 from 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

On to step 11:
45 can be fit into 150 3 times, resulting in a remainder of 15.
Use 3 as the next digit of our solution. 
Result so far: 354522.733
The remainder is 15 after subtracting 135 from 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

The quotient of the division is 354522.733, and the remainder is 0.0015.