Let's divide 66645894 by 72
The aim is to understand the frequency of 72 in 66645894.

On to step 1:
72 goes into 6 0 times with a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Append the next digit (6) from the dividend to 6 and continue with: 66 / 72

Moving on to step 2:
If we divide 66 by 72, we get 0 and a remainder of 66.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 66 after subtracting 0 from 66.
Take the next digit (6) from the dividend and append it to 66, then repeat: 666 / 72

Let's proceed to step 3:
72 goes into 666 9 times with a remainder of 18.
Use 9 as the next digit of our solution. 
Result so far: 9.0
The remainder is 18 after subtracting 648 from 666.
Append the next digit (4) from the dividend to 18 and continue with: 184 / 72

Moving on to step 4:
184 divided by 72 is 2 with a remainder of 40.
Write down 2 as next digit of the result. 
Result so far: 92.0
Subtracting 144 from 184 leaves us with 40.
Fetch the next digit (5) from the dividend, attach it to 40 and continue: 405 / 72

On to step 5:
72 goes into 405 5 times with a remainder of 45.
Record the quotient 5 as the next digit in the result. 
Result so far: 925.0
Subtract 360 from 405 to get 45.
Append the next digit (8) from the dividend to 45 and continue with: 458 / 72

Going ahead to step 6:
When dividing 458 by 72, we get 6 with a remainder of 26.
The next digit of our result is 6. 
Result so far: 9256.0
The remainder is 26 after subtracting 432 from 458.
Append the next digit (9) from the dividend to 26 and continue with: 269 / 72

Advancing to step 7:
269 divided by 72 is 3 with a remainder of 53.
Use 3 as the next digit of our solution. 
Result so far: 92563.0
The remainder is 53 after subtracting 216 from 269.
Bring next digit (4) of the dividend behind the 53 and repeat the process: 534 / 72

Moving on to step 8:
If we divide 534 by 72, we get 7 and a remainder of 30.
The next digit of our result is 7. 
Result so far: 925637.0
Subtracting 504 from 534 leaves us 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.

On to step 9:
The number 72 fits into 300 4 times, leaving a remainder of 12.
Put 4 as the next digit of the answer. 
Result so far: 925637.4
If we take 288 away from 300, we end up with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

On to step 10:
72 goes into 120 1 times with a remainder of 48.
Put 1 as the next digit of the answer. 
Result so far: 925637.41
If we take 72 away from 120, we end up with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Let's proceed to step 11:
72 can be fit into 480 6 times, resulting in a remainder of 48.
Record the quotient 6 as the next digit in the result. 
Result so far: 925637.416
The remainder is 48 after subtracting 432 from 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Advancing to step 12:
When dividing 480 by 72, we get 6 with a remainder of 48.
Use 6 as the next digit of our solution. 
Result so far: 925637.4166
The remainder is 48 after subtracting 432 from 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

The final result is 925637.4166 with a remainder of 0.00048.