We divide 15513742 by 45
The aim is to understand the frequency of 45 in 15513742.

Moving on to step 1:
1 divided by 45 is 0 with a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Append the next digit (5) from the dividend to 1 and continue with: 15 / 45

Going ahead to step 2:
45 can be fit into 15 0 times, resulting in a remainder of 15.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 15 and we're left with 15.
Take the next digit (5) from the dividend and append it to 15, then repeat: 155 / 45

Advancing to step 3:
The number 45 fits into 155 3 times, leaving a remainder of 20.
Put 3 as the next digit of the answer. 
Result so far: 3.0
Deduct 135 from 155 and we're left with 20.
Append the next digit (1) from the dividend to 20 and continue with: 201 / 45

Step 4:
201 divided by 45 is 4 with a remainder of 21.
Put 4 as the next digit of the answer. 
Result so far: 34.0
If we subtract 180 from 201, we get 21.
Include the next digit (3) from the dividend after 21, then repeat: 213 / 45

Moving on to step 5:
If we divide 213 by 45, we get 4 and a remainder of 33.
Use 4 as the next digit of our solution. 
Result so far: 344.0
Deduct 180 from 213 and we're left with 33.
Bring next digit (7) of the dividend behind the 33 and repeat the process: 337 / 45

Moving on to step 6:
If we divide 337 by 45, we get 7 and a remainder of 22.
Put 7 as the next digit of the answer. 
Result so far: 3447.0
If we subtract 315 from 337, we get 22.
Bring next digit (4) of the dividend behind the 22 and repeat the process: 224 / 45

Let's proceed to step 7:
The number 45 fits into 224 4 times, leaving a remainder of 44.
Write down 4 as next digit of the result. 
Result so far: 34474.0
Deduct 180 from 224 and we're left with 44.
Take the next digit (2) from the dividend and append it to 44, then repeat: 442 / 45

Advancing to step 8:
45 can be fit into 442 9 times, resulting in a remainder of 37.
Use 9 as the next digit of our solution. 
Result so far: 344749.0
Subtract 405 from 442 to get 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Let's proceed to step 9:
45 can be fit into 370 8 times, resulting in a remainder of 10.
Put 8 as the next digit of the answer. 
Result so far: 344749.8
Deduct 360 from 370 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 10:
45 goes into 100 2 times with a remainder of 10.
The number 2 becomes the next digit in our result. 
Result so far: 344749.82
If we subtract 90 from 100, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 11:
45 goes into 100 2 times with a remainder of 10.
Write down 2 as next digit of the result. 
Result so far: 344749.822
Deduct 90 from 100 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

The final result is 344749.822 with a remainder of 0.001.