986583 ÷ 77 
The aim is to understand the frequency of 77 in 986583.

On to step 1:
9 divided by 77 is 0 with a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 9, we end up with 9.
Grab the next digit (8) from the dividend, add it to 9, then carry on: 98 / 77

Going ahead to step 2:
77 goes into 98 1 times with a remainder of 21.
The next digit of our result is 1. 
Result so far: 1.0
Deduct 77 from 98 and we're left with 21.
Bring next digit (6) of the dividend behind the 21 and repeat the process: 216 / 77

Let's proceed to step 3:
The number 77 fits into 216 2 times, leaving a remainder of 62.
Record the quotient 2 as the next digit in the result. 
Result so far: 12.0
The remainder is 62 after subtracting 154 from 216.
Include the next digit (5) from the dividend after 62, then repeat: 625 / 77

Moving on to step 4:
When dividing 625 by 77, we get 8 with a remainder of 9.
Record the quotient 8 as the next digit in the result. 
Result so far: 128.0
Subtracting 616 from 625 leaves us with 9.
Bring next digit (8) of the dividend behind the 9 and repeat the process: 98 / 77

Going ahead to step 5:
The number 77 fits into 98 1 times, leaving a remainder of 21.
The next digit of our result is 1. 
Result so far: 1281.0
Subtracting 77 from 98 leaves us with 21.
Include the next digit (3) from the dividend after 21, then repeat: 213 / 77

Going ahead to step 6:
77 can be fit into 213 2 times, resulting in a remainder of 59.
The next digit of our result is 2. 
Result so far: 12812.0
Deduct 154 from 213 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.

On to step 7:
When dividing 590 by 77, we get 7 with a remainder of 51.
Record the quotient 7 as the next digit in the result. 
Result so far: 12812.7
Deduct 539 from 590 and we're left with 51.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

Let's proceed to step 8:
The number 77 fits into 510 6 times, leaving a remainder of 48.
Write down 6 as next digit of the result. 
Result so far: 12812.76
Subtract 462 from 510 to get 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Advancing to step 9:
77 can be fit into 480 6 times, resulting in a remainder of 18.
The number 6 becomes the next digit in our result. 
Result so far: 12812.766
Deduct 462 from 480 and we're left with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Our division results in 12812.766 with a remaining 0.0018.