We look at the division of 371488 by 45 
The aim is to understand the frequency of 45 in 371488.

On to step 1:
3 divided by 45 is 0 with a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Take the next digit (7) from the dividend and append it to 3, then repeat: 37 / 45

On to step 2:
The number 45 fits into 37 0 times, leaving a remainder of 37.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 37, we end up with 37.
Grab the next digit (1) from the dividend, add it to 37, then carry on: 371 / 45

Moving on to step 3:
45 goes into 371 8 times with a remainder of 11.
Record the quotient 8 as the next digit in the result. 
Result so far: 8.0
Deduct 360 from 371 and we're left with 11.
Fetch the next digit (4) from the dividend, attach it to 11 and continue: 114 / 45

Let's proceed to step 4:
If we divide 114 by 45, we get 2 and a remainder of 24.
The number 2 becomes the next digit in our result. 
Result so far: 82.0
If we take 90 away from 114, we end up with 24.
Grab the next digit (8) from the dividend, add it to 24, then carry on: 248 / 45

Moving on to step 5:
If we divide 248 by 45, we get 5 and a remainder of 23.
The next digit of our result is 5. 
Result so far: 825.0
If we take 225 away from 248, we end up with 23.
Append the next digit (8) from the dividend to 23 and continue with: 238 / 45

Going ahead to step 6:
45 goes into 238 5 times with a remainder of 13.
Write down 5 as next digit of the result. 
Result so far: 8255.0
If we take 225 away from 238, we end up with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Going ahead to step 7:
45 goes into 130 2 times with a remainder of 40.
The number 2 becomes the next digit in our result. 
Result so far: 8255.2
If we subtract 90 from 130, we 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.

Let's proceed to step 8:
400 divided by 45 is 8 with a remainder of 40.
The next digit of our result is 8. 
Result so far: 8255.28
If we take 360 away from 400, 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.

Advancing to step 9:
45 goes into 400 8 times with a remainder of 40.
Put 8 as the next digit of the answer. 
Result so far: 8255.288
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.

The quotient of the division is 8255.288, and the remainder is 0.004.