Let's divide 753712 by 45
The aim is to understand the frequency of 45 in 753712.

Let's proceed to step 1:
7 divided by 45 is 0 with a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Bring next digit (5) of the dividend behind the 7 and repeat the process: 75 / 45

Moving on to step 2:
The number 45 fits into 75 1 times, leaving a remainder of 30.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtract 45 from 75 to get 30.
Take the next digit (3) from the dividend and append it to 30, then repeat: 303 / 45

Advancing to step 3:
303 divided by 45 is 6 with a remainder of 33.
Record the quotient 6 as the next digit in the result. 
Result so far: 16.0
Subtracting 270 from 303 leaves us with 33.
Take the next digit (7) from the dividend and append it to 33, then repeat: 337 / 45

Let's proceed to step 4:
When dividing 337 by 45, we get 7 with a remainder of 22.
Record the quotient 7 as the next digit in the result. 
Result so far: 167.0
The remainder is 22 after subtracting 315 from 337.
Include the next digit (1) from the dividend after 22, then repeat: 221 / 45

On to step 5:
The number 45 fits into 221 4 times, leaving a remainder of 41.
The number 4 becomes the next digit in our result. 
Result so far: 1674.0
If we take 180 away from 221, we end up with 41.
Fetch the next digit (2) from the dividend, attach it to 41 and continue: 412 / 45

Advancing to step 6:
45 goes into 412 9 times with a remainder of 7.
Record the quotient 9 as the next digit in the result. 
Result so far: 16749.0
Deduct 405 from 412 and we're left with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

On to step 7:
The number 45 fits into 70 1 times, leaving a remainder of 25.
The number 1 becomes the next digit in our result. 
Result so far: 16749.1
Subtracting 45 from 70 leaves us 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 8:
250 divided by 45 is 5 with a remainder of 25.
Write down 5 as next digit of the result. 
Result so far: 16749.15
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:
When dividing 250 by 45, we get 5 with a remainder of 25.
Write down 5 as next digit of the result. 
Result so far: 16749.155
Subtract 225 from 250 to 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.

The final result is 16749.155 with a remainder of 0.0025.