621028 ÷ 77 
The aim is to understand the frequency of 77 in 621028.

Going ahead to step 1:
77 goes into 6 0 times with a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Take the next digit (2) from the dividend and append it to 6, then repeat: 62 / 77

Moving on to step 2:
77 can be fit into 62 0 times, resulting in a remainder of 62.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 62 after subtracting 0 from 62.
Append the next digit (1) from the dividend to 62 and continue with: 621 / 77

Advancing to step 3:
If we divide 621 by 77, we get 8 and a remainder of 5.
Write down 8 as next digit of the result. 
Result so far: 8.0
Subtracting 616 from 621 leaves us with 5.
Take the next digit (0) from the dividend and append it to 5, then repeat: 50 / 77

On to step 4:
When dividing 50 by 77, we get 0 with a remainder of 50.
Use 0 as the next digit of our solution. 
Result so far: 80.0
Deduct 0 from 50 and we're left with 50.
Bring next digit (2) of the dividend behind the 50 and repeat the process: 502 / 77

Going ahead to step 5:
If we divide 502 by 77, we get 6 and a remainder of 40.
Use 6 as the next digit of our solution. 
Result so far: 806.0
Subtracting 462 from 502 leaves us with 40.
Fetch the next digit (8) from the dividend, attach it to 40 and continue: 408 / 77

Step 6:
The number 77 fits into 408 5 times, leaving a remainder of 23.
Use 5 as the next digit of our solution. 
Result so far: 8065.0
If we subtract 385 from 408, 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 7:
When dividing 230 by 77, we get 2 with a remainder of 76.
Use 2 as the next digit of our solution. 
Result so far: 8065.2
Subtracting 154 from 230 leaves us 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.

Moving on to step 8:
When dividing 760 by 77, we get 9 with a remainder of 67.
The next digit of our result is 9. 
Result so far: 8065.29
Deduct 693 from 760 and we're left 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.

Let's proceed to step 9:
When dividing 670 by 77, we get 8 with a remainder of 54.
Put 8 as the next digit of the answer. 
Result so far: 8065.298
Deduct 616 from 670 and we're left 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.

Going ahead to step 10:
77 can be fit into 540 7 times, resulting in a remainder of 1.
Write down 7 as next digit of the result. 
Result so far: 8065.2987
If we take 539 away from 540, we end up with 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 11:
77 can be fit into 10 0 times, resulting in a remainder of 10.
Write down 0 as next digit of the result. 
Result so far: 8065.2987
If we subtract 0 from 10, we 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.

Let's proceed to step 12:
When dividing 100 by 77, we get 1 with a remainder of 23.
Write down 1 as next digit of the result. 
Result so far: 8065.298701
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 13:
The number 77 fits into 230 2 times, leaving a remainder of 76.
Use 2 as the next digit of our solution. 
Result so far: 8065.2987012
Deduct 154 from 230 and we're left 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.

Let's proceed to step 14:
If we divide 760 by 77, we get 9 and a remainder of 67.
The next digit of our result is 9. 
Result so far: 8065.29870129
If we subtract 693 from 760, we get 67.
Since there are no more digits in the dividend, we add a zero to the remainder making it 670, and continue the process.

Our division results in 8065.29870129 with a remaining 6.7e-08.