363873 ÷ 77 
The aim is to understand the frequency of 77 in 363873.

Step 1:
When dividing 3 by 77, we get 0 with a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Include the next digit (6) from the dividend after 3, then repeat: 36 / 77

Advancing to step 2:
77 can be fit into 36 0 times, resulting in a remainder of 36.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 36 after subtracting 0 from 36.
Append the next digit (3) from the dividend to 36 and continue with: 363 / 77

Let's proceed to step 3:
77 can be fit into 363 4 times, resulting in a remainder of 55.
Write down 4 as next digit of the result. 
Result so far: 4.0
Subtract 308 from 363 to get 55.
Include the next digit (8) from the dividend after 55, then repeat: 558 / 77

Moving on to step 4:
77 can be fit into 558 7 times, resulting in a remainder of 19.
Record the quotient 7 as the next digit in the result. 
Result so far: 47.0
Subtract 539 from 558 to get 19.
Bring next digit (7) of the dividend behind the 19 and repeat the process: 197 / 77

Step 5:
197 divided by 77 is 2 with a remainder of 43.
The number 2 becomes the next digit in our result. 
Result so far: 472.0
Subtract 154 from 197 to get 43.
Include the next digit (3) from the dividend after 43, then repeat: 433 / 77

Let's proceed to step 6:
The number 77 fits into 433 5 times, leaving a remainder of 48.
Use 5 as the next digit of our solution. 
Result so far: 4725.0
If we take 385 away from 433, we end up with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Let's proceed to step 7:
When dividing 480 by 77, we get 6 with a remainder of 18.
Write down 6 as next digit of the result. 
Result so far: 4725.6
If we subtract 462 from 480, we get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Step 8:
When dividing 180 by 77, we get 2 with a remainder of 26.
Write down 2 as next digit of the result. 
Result so far: 4725.62
The remainder is 26 after subtracting 154 from 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Going ahead to step 9:
The number 77 fits into 260 3 times, leaving a remainder of 29.
Record the quotient 3 as the next digit in the result. 
Result so far: 4725.623
Subtracting 231 from 260 leaves us with 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

On to step 10:
When dividing 290 by 77, we get 3 with a remainder of 59.
The next digit of our result is 3. 
Result so far: 4725.6233
Deduct 231 from 290 and we're left with 59.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

The quotient of the division is 4725.6233, and the remainder is 0.00059.