We look at the division of 183501 by 77 
The aim is to understand the frequency of 77 in 183501.

On to step 1:
77 goes into 1 0 times with a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Bring next digit (8) of the dividend behind the 1 and repeat the process: 18 / 77

Step 2:
The number 77 fits into 18 0 times, leaving a remainder of 18.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 18 and we're left with 18.
Append the next digit (3) from the dividend to 18 and continue with: 183 / 77

Advancing to step 3:
When dividing 183 by 77, we get 2 with a remainder of 29.
Put 2 as the next digit of the answer. 
Result so far: 2.0
Subtract 154 from 183 to get 29.
Append the next digit (5) from the dividend to 29 and continue with: 295 / 77

Going ahead to step 4:
When dividing 295 by 77, we get 3 with a remainder of 64.
Record the quotient 3 as the next digit in the result. 
Result so far: 23.0
If we subtract 231 from 295, we get 64.
Append the next digit (0) from the dividend to 64 and continue with: 640 / 77

Let's proceed to step 5:
640 divided by 77 is 8 with a remainder of 24.
The number 8 becomes the next digit in our result. 
Result so far: 238.0
If we take 616 away from 640, we end up with 24.
Bring next digit (1) of the dividend behind the 24 and repeat the process: 241 / 77

Step 6:
The number 77 fits into 241 3 times, leaving a remainder of 10.
The number 3 becomes the next digit in our result. 
Result so far: 2383.0
Subtract 231 from 241 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 7:
100 divided by 77 is 1 with a remainder of 23.
The next digit of our result is 1. 
Result so far: 2383.1
Subtracting 77 from 100 leaves us with 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Step 8:
77 goes into 230 2 times with a remainder of 76.
Use 2 as the next digit of our solution. 
Result so far: 2383.12
Subtract 154 from 230 to get 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

On to step 9:
When dividing 760 by 77, we get 9 with a remainder of 67.
Put 9 as the next digit of the answer. 
Result so far: 2383.129
Subtracting 693 from 760 leaves us with 67.
Since there are no more digits in the dividend, we add a zero to the remainder making it 670, and continue the process.

Going ahead to step 10:
77 can be fit into 670 8 times, resulting in a remainder of 54.
Put 8 as the next digit of the answer. 
Result so far: 2383.1298
If we take 616 away from 670, we end up with 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Moving on to step 11:
When dividing 540 by 77, we get 7 with a remainder of 1.
Use 7 as the next digit of our solution. 
Result so far: 2383.12987
Subtract 539 from 540 to get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Going ahead to step 12:
When dividing 10 by 77, we get 0 with a remainder of 10.
Write down 0 as next digit of the result. 
Result so far: 2383.12987
The remainder is 10 after subtracting 0 from 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 13:
77 can be fit into 100 1 times, resulting in a remainder of 23.
The next digit of our result is 1. 
Result so far: 2383.1298701
If we subtract 77 from 100, we get 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Going ahead to step 14:
77 goes into 230 2 times with a remainder of 76.
The next digit of our result is 2. 
Result so far: 2383.12987012
If we take 154 away from 230, we end up with 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

After the division, we end up with 2383.12987012 and a remainder of 7.6e-08.