We divide 571423 by 45
The aim is to understand the frequency of 45 in 571423.

Advancing to step 1:
5 divided by 45 is 0 with a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Fetch the next digit (7) from the dividend, attach it to 5 and continue: 57 / 45

Let's proceed to step 2:
The number 45 fits into 57 1 times, leaving a remainder of 12.
The next digit of our result is 1. 
Result so far: 1.0
The remainder is 12 after subtracting 45 from 57.
Bring next digit (1) of the dividend behind the 12 and repeat the process: 121 / 45

On to step 3:
45 can be fit into 121 2 times, resulting in a remainder of 31.
Put 2 as the next digit of the answer. 
Result so far: 12.0
Subtract 90 from 121 to get 31.
Grab the next digit (4) from the dividend, add it to 31, then carry on: 314 / 45

Let's proceed to step 4:
45 goes into 314 6 times with a remainder of 44.
Record the quotient 6 as the next digit in the result. 
Result so far: 126.0
Deduct 270 from 314 and we're left with 44.
Take the next digit (2) from the dividend and append it to 44, then repeat: 442 / 45

Step 5:
If we divide 442 by 45, we get 9 and a remainder of 37.
The number 9 becomes the next digit in our result. 
Result so far: 1269.0
Subtract 405 from 442 to get 37.
Bring next digit (3) of the dividend behind the 37 and repeat the process: 373 / 45

Moving on to step 6:
45 can be fit into 373 8 times, resulting in a remainder of 13.
Write down 8 as next digit of the result. 
Result so far: 12698.0
Subtract 360 from 373 to get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Moving on to step 7:
If we divide 130 by 45, we get 2 and a remainder of 40.
Put 2 as the next digit of the answer. 
Result so far: 12698.2
If we take 90 away from 130, we end up 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.

Going ahead to step 8:
400 divided by 45 is 8 with a remainder of 40.
Write down 8 as next digit of the result. 
Result so far: 12698.28
The remainder is 40 after subtracting 360 from 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Moving on to step 9:
If we divide 400 by 45, we get 8 and a remainder of 40.
Record the quotient 8 as the next digit in the result. 
Result so far: 12698.288
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 outcome is 12698.288, with a leftover of 0.004.