Let's divide 77403959 by 308
The aim is to understand the frequency of 308 in 77403959.

Advancing to step 1:
The number 308 fits into 7 0 times, leaving a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Bring next digit (7) of the dividend behind the 7 and repeat the process: 77 / 308

Moving on to step 2:
If we divide 77 by 308, we get 0 and a remainder of 77.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 77 after subtracting 0 from 77.
Append the next digit (4) from the dividend to 77 and continue with: 774 / 308

Let's proceed to step 3:
When dividing 774 by 308, we get 2 with a remainder of 158.
Write down 2 as next digit of the result. 
Result so far: 2.0
The remainder is 158 after subtracting 616 from 774.
Grab the next digit (0) from the dividend, add it to 158, then carry on: 1580 / 308

Step 4:
1580 divided by 308 is 5 with a remainder of 40.
Use 5 as the next digit of our solution. 
Result so far: 25.0
The remainder is 40 after subtracting 1540 from 1580.
Include the next digit (3) from the dividend after 40, then repeat: 403 / 308

Advancing to step 5:
308 goes into 403 1 times with a remainder of 95.
Put 1 as the next digit of the answer. 
Result so far: 251.0
The remainder is 95 after subtracting 308 from 403.
Take the next digit (9) from the dividend and append it to 95, then repeat: 959 / 308

Let's proceed to step 6:
308 can be fit into 959 3 times, resulting in a remainder of 35.
The next digit of our result is 3. 
Result so far: 2513.0
Deduct 924 from 959 and we're left with 35.
Append the next digit (5) from the dividend to 35 and continue with: 355 / 308

Step 7:
308 can be fit into 355 1 times, resulting in a remainder of 47.
Put 1 as the next digit of the answer. 
Result so far: 25131.0
Subtracting 308 from 355 leaves us with 47.
Fetch the next digit (9) from the dividend, attach it to 47 and continue: 479 / 308

On to step 8:
308 can be fit into 479 1 times, resulting in a remainder of 171.
The number 1 becomes the next digit in our result. 
Result so far: 251311.0
If we subtract 308 from 479, we get 171.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1710, and continue the process.

Advancing to step 9:
308 can be fit into 1710 5 times, resulting in a remainder of 170.
Use 5 as the next digit of our solution. 
Result so far: 251311.5
Subtract 1540 from 1710 to get 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1700, and continue the process.

On to step 10:
308 goes into 1700 5 times with a remainder of 160.
The number 5 becomes the next digit in our result. 
Result so far: 251311.55
Subtract 1540 from 1700 to get 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

After the division, we end up with 251311.55 and a remainder of 0.16.