We look at the division of 76774899 by 72 
The aim is to understand the frequency of 72 in 76774899.

Step 1:
The number 72 fits into 7 0 times, leaving a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Append the next digit (6) from the dividend to 7 and continue with: 76 / 72

Advancing to step 2:
The number 72 fits into 76 1 times, leaving a remainder of 4.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Deduct 72 from 76 and we're left with 4.
Fetch the next digit (7) from the dividend, attach it to 4 and continue: 47 / 72

Advancing to step 3:
47 divided by 72 is 0 with a remainder of 47.
Record the quotient 0 as the next digit in the result. 
Result so far: 10.0
If we take 0 away from 47, we end up with 47.
Take the next digit (7) from the dividend and append it to 47, then repeat: 477 / 72

On to step 4:
72 goes into 477 6 times with a remainder of 45.
Write down 6 as next digit of the result. 
Result so far: 106.0
Subtract 432 from 477 to get 45.
Include the next digit (4) from the dividend after 45, then repeat: 454 / 72

Advancing to step 5:
When dividing 454 by 72, we get 6 with a remainder of 22.
Write down 6 as next digit of the result. 
Result so far: 1066.0
Subtracting 432 from 454 leaves us with 22.
Include the next digit (8) from the dividend after 22, then repeat: 228 / 72

On to step 6:
228 divided by 72 is 3 with a remainder of 12.
Write down 3 as next digit of the result. 
Result so far: 10663.0
Subtract 216 from 228 to get 12.
Fetch the next digit (9) from the dividend, attach it to 12 and continue: 129 / 72

Let's proceed to step 7:
72 goes into 129 1 times with a remainder of 57.
Write down 1 as next digit of the result. 
Result so far: 106631.0
Subtract 72 from 129 to get 57.
Grab the next digit (9) from the dividend, add it to 57, then carry on: 579 / 72

Let's proceed to step 8:
72 can be fit into 579 8 times, resulting in a remainder of 3.
Write down 8 as next digit of the result. 
Result so far: 1066318.0
Subtract 576 from 579 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:
When dividing 30 by 72, we get 0 with a remainder of 30.
Write down 0 as next digit of the result. 
Result so far: 1066318.0
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.

Advancing to step 10:
72 goes into 300 4 times with a remainder of 12.
The number 4 becomes the next digit in our result. 
Result so far: 1066318.04
If we subtract 288 from 300, we get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Step 11:
When dividing 120 by 72, we get 1 with a remainder of 48.
Use 1 as the next digit of our solution. 
Result so far: 1066318.041
Subtracting 72 from 120 leaves us 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.

Moving on to step 12:
The number 72 fits into 480 6 times, leaving a remainder of 48.
The next digit of our result is 6. 
Result so far: 1066318.0416
If we subtract 432 from 480, we get 48.
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 13:
When dividing 480 by 72, we get 6 with a remainder of 48.
Put 6 as the next digit of the answer. 
Result so far: 1066318.04166
If we subtract 432 from 480, we get 48.
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 1066318.04166 with a remainder of 4.8e-05.