We're dividing 72190501 by 77 
The aim is to understand the frequency of 77 in 72190501.

Moving on to step 1:
7 divided by 77 is 0 with a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Grab the next digit (2) from the dividend, add it to 7, then carry on: 72 / 77

Advancing to step 2:
If we divide 72 by 77, we get 0 and a remainder of 72.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 72, we end up with 72.
Append the next digit (1) from the dividend to 72 and continue with: 721 / 77

Let's proceed to step 3:
721 divided by 77 is 9 with a remainder of 28.
Record the quotient 9 as the next digit in the result. 
Result so far: 9.0
Subtract 693 from 721 to get 28.
Bring next digit (9) of the dividend behind the 28 and repeat the process: 289 / 77

Let's proceed to step 4:
289 divided by 77 is 3 with a remainder of 58.
Record the quotient 3 as the next digit in the result. 
Result so far: 93.0
If we take 231 away from 289, we end up with 58.
Take the next digit (0) from the dividend and append it to 58, then repeat: 580 / 77

Step 5:
The number 77 fits into 580 7 times, leaving a remainder of 41.
The next digit of our result is 7. 
Result so far: 937.0
Subtracting 539 from 580 leaves us with 41.
Append the next digit (5) from the dividend to 41 and continue with: 415 / 77

Step 6:
77 goes into 415 5 times with a remainder of 30.
Use 5 as the next digit of our solution. 
Result so far: 9375.0
If we take 385 away from 415, we end up with 30.
Append the next digit (0) from the dividend to 30 and continue with: 300 / 77

Advancing to step 7:
300 divided by 77 is 3 with a remainder of 69.
The number 3 becomes the next digit in our result. 
Result so far: 93753.0
If we subtract 231 from 300, we get 69.
Append the next digit (1) from the dividend to 69 and continue with: 691 / 77

Let's proceed to step 8:
691 divided by 77 is 8 with a remainder of 75.
The number 8 becomes the next digit in our result. 
Result so far: 937538.0
If we subtract 616 from 691, we get 75.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

Step 9:
77 can be fit into 750 9 times, resulting in a remainder of 57.
Record the quotient 9 as the next digit in the result. 
Result so far: 937538.9
Subtracting 693 from 750 leaves us with 57.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

Advancing to step 10:
If we divide 570 by 77, we get 7 and a remainder of 31.
Use 7 as the next digit of our solution. 
Result so far: 937538.97
If we take 539 away from 570, we end up with 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

Moving on to step 11:
77 goes into 310 4 times with a remainder of 2.
The next digit of our result is 4. 
Result so far: 937538.974
If we subtract 308 from 310, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Going ahead to step 12:
77 can be fit into 20 0 times, resulting in a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 937538.974
Deduct 0 from 20 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Moving on to step 13:
200 divided by 77 is 2 with a remainder of 46.
The number 2 becomes the next digit in our result. 
Result so far: 937538.97402
If we take 154 away from 200, we end up with 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Advancing to step 14:
460 divided by 77 is 5 with a remainder of 75.
The next digit of our result is 5. 
Result so far: 937538.974025
Subtract 385 from 460 to get 75.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

Step 15:
750 divided by 77 is 9 with a remainder of 57.
Use 9 as the next digit of our solution. 
Result so far: 937538.9740259
The remainder is 57 after subtracting 693 from 750.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

Advancing to step 16:
77 can be fit into 570 7 times, resulting in a remainder of 31.
Use 7 as the next digit of our solution. 
Result so far: 937538.97402597
If we subtract 539 from 570, we get 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

The final outcome is 937538.97402597, with a leftover of 3.1e-08.