Let's divide 66725643 by 45
The aim is to understand the frequency of 45 in 66725643.

On to step 1:
6 divided by 45 is 0 with a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Append the next digit (6) from the dividend to 6 and continue with: 66 / 45

Let's proceed to step 2:
When dividing 66 by 45, we get 1 with a remainder of 21.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtracting 45 from 66 leaves us with 21.
Grab the next digit (7) from the dividend, add it to 21, then carry on: 217 / 45

Advancing to step 3:
45 goes into 217 4 times with a remainder of 37.
Use 4 as the next digit of our solution. 
Result so far: 14.0
Subtract 180 from 217 to get 37.
Include the next digit (2) from the dividend after 37, then repeat: 372 / 45

On to step 4:
372 divided by 45 is 8 with a remainder of 12.
Record the quotient 8 as the next digit in the result. 
Result so far: 148.0
Deduct 360 from 372 and we're left with 12.
Include the next digit (5) from the dividend after 12, then repeat: 125 / 45

Going ahead to step 5:
125 divided by 45 is 2 with a remainder of 35.
Write down 2 as next digit of the result. 
Result so far: 1482.0
If we take 90 away from 125, we end up with 35.
Fetch the next digit (6) from the dividend, attach it to 35 and continue: 356 / 45

Going ahead to step 6:
If we divide 356 by 45, we get 7 and a remainder of 41.
The number 7 becomes the next digit in our result. 
Result so far: 14827.0
The remainder is 41 after subtracting 315 from 356.
Append the next digit (4) from the dividend to 41 and continue with: 414 / 45

Step 7:
The number 45 fits into 414 9 times, leaving a remainder of 9.
Write down 9 as next digit of the result. 
Result so far: 148279.0
If we subtract 405 from 414, we get 9.
Take the next digit (3) from the dividend and append it to 9, then repeat: 93 / 45

Moving on to step 8:
If we divide 93 by 45, we get 2 and a remainder of 3.
The number 2 becomes the next digit in our result. 
Result so far: 1482792.0
Subtract 90 from 93 to get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

On to step 9:
If we divide 30 by 45, we get 0 and a remainder of 30.
Write down 0 as next digit of the result. 
Result so far: 1482792.0
Deduct 0 from 30 and we're left with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Let's proceed to step 10:
300 divided by 45 is 6 with a remainder of 30.
Use 6 as the next digit of our solution. 
Result so far: 1482792.06
If we subtract 270 from 300, we get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Let's proceed to step 11:
45 can be fit into 300 6 times, resulting in a remainder of 30.
Record the quotient 6 as the next digit in the result. 
Result so far: 1482792.066
Deduct 270 from 300 and we're left with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Our division results in 1482792.066 with a remaining 0.003.