16404 ÷ 77 
The aim is to understand the frequency of 77 in 16404.

Moving on to step 1:
77 can be fit into 1 0 times, resulting in a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Include the next digit (6) from the dividend after 1, then repeat: 16 / 77

Step 2:
When dividing 16 by 77, we get 0 with a remainder of 16.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 16, we end up with 16.
Bring next digit (4) of the dividend behind the 16 and repeat the process: 164 / 77

Step 3:
If we divide 164 by 77, we get 2 and a remainder of 10.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
If we take 154 away from 164, we end up with 10.
Bring next digit (0) of the dividend behind the 10 and repeat the process: 100 / 77

Moving on to step 4:
100 divided by 77 is 1 with a remainder of 23.
Put 1 as the next digit of the answer. 
Result so far: 21.0
If we take 77 away from 100, we end up with 23.
Append the next digit (4) from the dividend to 23 and continue with: 234 / 77

Advancing to step 5:
77 can be fit into 234 3 times, resulting in a remainder of 3.
The number 3 becomes the next digit in our result. 
Result so far: 213.0
If we take 231 away from 234, we end up with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

On to step 6:
30 divided by 77 is 0 with a remainder of 30.
The number 0 becomes the next digit in our result. 
Result so far: 213.0
If we take 0 away from 30, we end up with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

On to step 7:
If we divide 300 by 77, we get 3 and a remainder of 69.
Record the quotient 3 as the next digit in the result. 
Result so far: 213.03
Deduct 231 from 300 and we're left with 69.
Since there are no more digits in the dividend, we add a zero to the remainder making it 690, and continue the process.

Step 8:
When dividing 690 by 77, we get 8 with a remainder of 74.
Write down 8 as next digit of the result. 
Result so far: 213.038
The remainder is 74 after subtracting 616 from 690.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Advancing to step 9:
When dividing 740 by 77, we get 9 with a remainder of 47.
The next digit of our result is 9. 
Result so far: 213.0389
If we subtract 693 from 740, we get 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

Moving on to step 10:
If we divide 470 by 77, we get 6 and a remainder of 8.
The number 6 becomes the next digit in our result. 
Result so far: 213.03896
Deduct 462 from 470 and we're left with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

On to step 11:
77 can be fit into 80 1 times, resulting in a remainder of 3.
Record the quotient 1 as the next digit in the result. 
Result so far: 213.038961
If we take 77 away from 80, we end up with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Advancing to step 12:
77 goes into 30 0 times with a remainder of 30.
The number 0 becomes the next digit in our result. 
Result so far: 213.038961
Subtract 0 from 30 to get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Let's proceed to step 13:
The number 77 fits into 300 3 times, leaving a remainder of 69.
Write down 3 as next digit of the result. 
Result so far: 213.03896103
If we take 231 away from 300, we end up with 69.
Since there are no more digits in the dividend, we add a zero to the remainder making it 690, and continue the process.

Our division results in 213.03896103 with a remaining 6.9e-08.