Let's divide 777909 by 91
The aim is to understand the frequency of 91 in 777909.

Moving on to step 1:
91 goes into 7 0 times with a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Append the next digit (7) from the dividend to 7 and continue with: 77 / 91

Let's proceed to step 2:
The number 91 fits into 77 0 times, leaving a remainder of 77.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 77, we get 77.
Include the next digit (7) from the dividend after 77, then repeat: 777 / 91

Step 3:
91 can be fit into 777 8 times, resulting in a remainder of 49.
The number 8 becomes the next digit in our result. 
Result so far: 8.0
The remainder is 49 after subtracting 728 from 777.
Bring next digit (9) of the dividend behind the 49 and repeat the process: 499 / 91

Let's proceed to step 4:
499 divided by 91 is 5 with a remainder of 44.
Use 5 as the next digit of our solution. 
Result so far: 85.0
Subtract 455 from 499 to get 44.
Grab the next digit (0) from the dividend, add it to 44, then carry on: 440 / 91

Moving on to step 5:
91 can be fit into 440 4 times, resulting in a remainder of 76.
Record the quotient 4 as the next digit in the result. 
Result so far: 854.0
If we subtract 364 from 440, we get 76.
Fetch the next digit (9) from the dividend, attach it to 76 and continue: 769 / 91

Step 6:
The number 91 fits into 769 8 times, leaving a remainder of 41.
Use 8 as the next digit of our solution. 
Result so far: 8548.0
If we take 728 away from 769, we end up with 41.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

Moving on to step 7:
The number 91 fits into 410 4 times, leaving a remainder of 46.
The next digit of our result is 4. 
Result so far: 8548.4
If we subtract 364 from 410, we get 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 8:
When dividing 460 by 91, we get 5 with a remainder of 5.
The number 5 becomes the next digit in our result. 
Result so far: 8548.45
The remainder is 5 after subtracting 455 from 460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Moving on to step 9:
The number 91 fits into 50 0 times, leaving a remainder of 50.
Record the quotient 0 as the next digit in the result. 
Result so far: 8548.45
If we take 0 away from 50, we end up with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Step 10:
The number 91 fits into 500 5 times, leaving a remainder of 45.
Put 5 as the next digit of the answer. 
Result so far: 8548.4505
If we subtract 455 from 500, we get 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Let's proceed to step 11:
450 divided by 91 is 4 with a remainder of 86.
Record the quotient 4 as the next digit in the result. 
Result so far: 8548.45054
The remainder is 86 after subtracting 364 from 450.
Since there are no more digits in the dividend, we add a zero to the remainder making it 860, and continue the process.

Advancing to step 12:
If we divide 860 by 91, we get 9 and a remainder of 41.
Record the quotient 9 as the next digit in the result. 
Result so far: 8548.450549
Subtract 819 from 860 to get 41.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

Let's proceed to step 13:
91 can be fit into 410 4 times, resulting in a remainder of 46.
The number 4 becomes the next digit in our result. 
Result so far: 8548.4505494
Subtract 364 from 410 to get 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Step 14:
460 divided by 91 is 5 with a remainder of 5.
The next digit of our result is 5. 
Result so far: 8548.45054945
Deduct 455 from 460 and we're left with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

The final outcome is 8548.45054945, with a leftover of 5e-09.