We look at the division of 162100 by 77 
The aim is to understand the frequency of 77 in 162100.

Step 1:
77 goes into 1 0 times with a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Append the next digit (6) from the dividend to 1 and continue with: 16 / 77

Step 2:
77 can be fit into 16 0 times, resulting in a remainder of 16.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 16 after subtracting 0 from 16.
Include the next digit (2) from the dividend after 16, then repeat: 162 / 77

Moving on to step 3:
162 divided by 77 is 2 with a remainder of 8.
The next digit of our result is 2. 
Result so far: 2.0
Subtracting 154 from 162 leaves us with 8.
Include the next digit (1) from the dividend after 8, then repeat: 81 / 77

Going ahead to step 4:
81 divided by 77 is 1 with a remainder of 4.
The number 1 becomes the next digit in our result. 
Result so far: 21.0
The remainder is 4 after subtracting 77 from 81.
Fetch the next digit (0) from the dividend, attach it to 4 and continue: 40 / 77

Advancing to step 5:
When dividing 40 by 77, we get 0 with a remainder of 40.
The number 0 becomes the next digit in our result. 
Result so far: 210.0
If we take 0 away from 40, we end up with 40.
Append the next digit (0) from the dividend to 40 and continue with: 400 / 77

Moving on to step 6:
The number 77 fits into 400 5 times, leaving a remainder of 15.
The number 5 becomes the next digit in our result. 
Result so far: 2105.0
Subtracting 385 from 400 leaves us with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Step 7:
77 can be fit into 150 1 times, resulting in a remainder of 73.
Put 1 as the next digit of the answer. 
Result so far: 2105.1
If we take 77 away from 150, we end up with 73.
Since there are no more digits in the dividend, we add a zero to the remainder making it 730, and continue the process.

Advancing to step 8:
When dividing 730 by 77, we get 9 with a remainder of 37.
Use 9 as the next digit of our solution. 
Result so far: 2105.19
If we take 693 away from 730, we end up with 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

On to step 9:
When dividing 370 by 77, we get 4 with a remainder of 62.
The next digit of our result is 4. 
Result so far: 2105.194
If we take 308 away from 370, we end up with 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Moving on to step 10:
77 can be fit into 620 8 times, resulting in a remainder of 4.
Use 8 as the next digit of our solution. 
Result so far: 2105.1948
Deduct 616 from 620 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 11:
The number 77 fits into 40 0 times, leaving a remainder of 40.
Use 0 as the next digit of our solution. 
Result so far: 2105.1948
Subtract 0 from 40 to get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Going ahead to step 12:
77 goes into 400 5 times with a remainder of 15.
Put 5 as the next digit of the answer. 
Result so far: 2105.194805
Subtracting 385 from 400 leaves us with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Advancing to step 13:
77 can be fit into 150 1 times, resulting in a remainder of 73.
Write down 1 as next digit of the result. 
Result so far: 2105.1948051
If we subtract 77 from 150, we get 73.
Since there are no more digits in the dividend, we add a zero to the remainder making it 730, and continue the process.

Moving on to step 14:
730 divided by 77 is 9 with a remainder of 37.
The next digit of our result is 9. 
Result so far: 2105.19480519
If we subtract 693 from 730, we get 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Our division results in 2105.19480519 with a remaining 3.7e-08.