We look at the division of 291908 by 77 
The aim is to understand the frequency of 77 in 291908.

Moving on to step 1:
77 goes into 2 0 times with a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Grab the next digit (9) from the dividend, add it to 2, then carry on: 29 / 77

Step 2:
29 divided by 77 is 0 with a remainder of 29.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 29 leaves us with 29.
Grab the next digit (1) from the dividend, add it to 29, then carry on: 291 / 77

Going ahead to step 3:
77 goes into 291 3 times with a remainder of 60.
Use 3 as the next digit of our solution. 
Result so far: 3.0
If we subtract 231 from 291, we get 60.
Append the next digit (9) from the dividend to 60 and continue with: 609 / 77

On to step 4:
When dividing 609 by 77, we get 7 with a remainder of 70.
The next digit of our result is 7. 
Result so far: 37.0
Subtracting 539 from 609 leaves us with 70.
Include the next digit (0) from the dividend after 70, then repeat: 700 / 77

Advancing to step 5:
When dividing 700 by 77, we get 9 with a remainder of 7.
The number 9 becomes the next digit in our result. 
Result so far: 379.0
Subtracting 693 from 700 leaves us with 7.
Grab the next digit (8) from the dividend, add it to 7, then carry on: 78 / 77

Advancing to step 6:
77 goes into 78 1 times with a remainder of 1.
Put 1 as the next digit of the answer. 
Result so far: 3791.0
If we take 77 away from 78, we end up with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Moving on to step 7:
10 divided by 77 is 0 with a remainder of 10.
The next digit of our result is 0. 
Result so far: 3791.0
Subtracting 0 from 10 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 8:
If we divide 100 by 77, we get 1 and a remainder of 23.
The number 1 becomes the next digit in our result. 
Result so far: 3791.01
If we subtract 77 from 100, we get 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Moving on to step 9:
77 can be fit into 230 2 times, resulting in a remainder of 76.
The number 2 becomes the next digit in our result. 
Result so far: 3791.012
Subtract 154 from 230 to get 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Advancing to step 10:
760 divided by 77 is 9 with a remainder of 67.
The number 9 becomes the next digit in our result. 
Result so far: 3791.0129
If we subtract 693 from 760, we get 67.
Since there are no more digits in the dividend, we add a zero to the remainder making it 670, and continue the process.

Advancing to step 11:
670 divided by 77 is 8 with a remainder of 54.
Record the quotient 8 as the next digit in the result. 
Result so far: 3791.01298
Deduct 616 from 670 and we're left with 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

On to step 12:
77 goes into 540 7 times with a remainder of 1.
Use 7 as the next digit of our solution. 
Result so far: 3791.012987
If we subtract 539 from 540, we get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Moving on to step 13:
77 goes into 10 0 times with a remainder of 10.
Put 0 as the next digit of the answer. 
Result so far: 3791.012987
Subtracting 0 from 10 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 14:
The number 77 fits into 100 1 times, leaving a remainder of 23.
The number 1 becomes the next digit in our result. 
Result so far: 3791.01298701
If we take 77 away from 100, we end up with 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

After the division, we end up with 3791.01298701 and a remainder of 2.3e-08.