We divide 308555 by 77
The aim is to understand the frequency of 77 in 308555.

Moving on to step 1:
The number 77 fits into 3 0 times, leaving a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Fetch the next digit (0) from the dividend, attach it to 3 and continue: 30 / 77

Let's proceed to step 2:
77 can be fit into 30 0 times, resulting in a remainder of 30.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 30, we end up with 30.
Fetch the next digit (8) from the dividend, attach it to 30 and continue: 308 / 77

Going ahead to step 3:
The number 77 fits into 308 4 times, leaving a remainder of 0.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
Deduct 308 from 308 and we're left with 0.
Append the next digit (5) from the dividend to 0 and continue with: 5 / 77

Going ahead to step 4:
The number 77 fits into 5 0 times, leaving a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 40.0
Subtract 0 from 5 to get 5.
Fetch the next digit (5) from the dividend, attach it to 5 and continue: 55 / 77

Moving on to step 5:
The number 77 fits into 55 0 times, leaving a remainder of 55.
Put 0 as the next digit of the answer. 
Result so far: 400.0
If we take 0 away from 55, we end up with 55.
Append the next digit (5) from the dividend to 55 and continue with: 555 / 77

Moving on to step 6:
77 can be fit into 555 7 times, resulting in a remainder of 16.
Record the quotient 7 as the next digit in the result. 
Result so far: 4007.0
Subtracting 539 from 555 leaves us with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Advancing to step 7:
The number 77 fits into 160 2 times, leaving a remainder of 6.
The next digit of our result is 2. 
Result so far: 4007.2
Deduct 154 from 160 and we're left with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

On to step 8:
When dividing 60 by 77, we get 0 with a remainder of 60.
Use 0 as the next digit of our solution. 
Result so far: 4007.2
If we take 0 away from 60, we end up with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Let's proceed to step 9:
77 can be fit into 600 7 times, resulting in a remainder of 61.
The number 7 becomes the next digit in our result. 
Result so far: 4007.207
If we subtract 539 from 600, we get 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Advancing to step 10:
If we divide 610 by 77, we get 7 and a remainder of 71.
Use 7 as the next digit of our solution. 
Result so far: 4007.2077
Subtract 539 from 610 to get 71.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

The final outcome is 4007.2077, with a leftover of 0.00071.