We look at the division of 72666894 by 305 
The aim is to understand the frequency of 305 in 72666894.

On to step 1:
305 can be fit into 7 0 times, resulting in a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Append the next digit (2) from the dividend to 7 and continue with: 72 / 305

On to step 2:
If we divide 72 by 305, we get 0 and a remainder of 72.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 72 and we're left with 72.
Grab the next digit (6) from the dividend, add it to 72, then carry on: 726 / 305

Advancing to step 3:
305 can be fit into 726 2 times, resulting in a remainder of 116.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
If we take 610 away from 726, we end up with 116.
Fetch the next digit (6) from the dividend, attach it to 116 and continue: 1166 / 305

Step 4:
1166 divided by 305 is 3 with a remainder of 251.
The number 3 becomes the next digit in our result. 
Result so far: 23.0
The remainder is 251 after subtracting 915 from 1166.
Fetch the next digit (6) from the dividend, attach it to 251 and continue: 2516 / 305

Let's proceed to step 5:
The number 305 fits into 2516 8 times, leaving a remainder of 76.
The number 8 becomes the next digit in our result. 
Result so far: 238.0
The remainder is 76 after subtracting 2440 from 2516.
Fetch the next digit (8) from the dividend, attach it to 76 and continue: 768 / 305

Moving on to step 6:
305 can be fit into 768 2 times, resulting in a remainder of 158.
The next digit of our result is 2. 
Result so far: 2382.0
The remainder is 158 after subtracting 610 from 768.
Append the next digit (9) from the dividend to 158 and continue with: 1589 / 305

On to step 7:
1589 divided by 305 is 5 with a remainder of 64.
Put 5 as the next digit of the answer. 
Result so far: 23825.0
Subtract 1525 from 1589 to get 64.
Bring next digit (4) of the dividend behind the 64 and repeat the process: 644 / 305

Moving on to step 8:
644 divided by 305 is 2 with a remainder of 34.
Use 2 as the next digit of our solution. 
Result so far: 238252.0
Deduct 610 from 644 and we're left with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Going ahead to step 9:
If we divide 340 by 305, we get 1 and a remainder of 35.
Record the quotient 1 as the next digit in the result. 
Result so far: 238252.1
The remainder is 35 after subtracting 305 from 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Going ahead to step 10:
350 divided by 305 is 1 with a remainder of 45.
The next digit of our result is 1. 
Result so far: 238252.11
Deduct 305 from 350 and we're left with 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

The final outcome is 238252.11, with a leftover of 0.045.