621018 ÷ 78 
The aim is to understand the frequency of 78 in 621018.

Advancing to step 1:
The number 78 fits into 6 0 times, leaving a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Include the next digit (2) from the dividend after 6, then repeat: 62 / 78

Moving on to step 2:
78 can be fit into 62 0 times, resulting in a remainder of 62.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 62 leaves us with 62.
Take the next digit (1) from the dividend and append it to 62, then repeat: 621 / 78

Going ahead to step 3:
If we divide 621 by 78, we get 7 and a remainder of 75.
Record the quotient 7 as the next digit in the result. 
Result so far: 7.0
Subtract 546 from 621 to get 75.
Append the next digit (0) from the dividend to 75 and continue with: 750 / 78

Advancing to step 4:
78 can be fit into 750 9 times, resulting in a remainder of 48.
Use 9 as the next digit of our solution. 
Result so far: 79.0
If we take 702 away from 750, we end up with 48.
Take the next digit (1) from the dividend and append it to 48, then repeat: 481 / 78

Advancing to step 5:
78 goes into 481 6 times with a remainder of 13.
Write down 6 as next digit of the result. 
Result so far: 796.0
If we take 468 away from 481, we end up with 13.
Take the next digit (8) from the dividend and append it to 13, then repeat: 138 / 78

On to step 6:
138 divided by 78 is 1 with a remainder of 60.
Record the quotient 1 as the next digit in the result. 
Result so far: 7961.0
If we take 78 away from 138, we end up with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Step 7:
If we divide 600 by 78, we get 7 and a remainder of 54.
Use 7 as the next digit of our solution. 
Result so far: 7961.7
If we take 546 away from 600, 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.

Going ahead to step 8:
The number 78 fits into 540 6 times, leaving a remainder of 72.
The number 6 becomes the next digit in our result. 
Result so far: 7961.76
If we take 468 away from 540, we end up with 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Step 9:
If we divide 720 by 78, we get 9 and a remainder of 18.
The number 9 becomes the next digit in our result. 
Result so far: 7961.769
Subtracting 702 from 720 leaves us 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.

Moving on to step 10:
The number 78 fits into 180 2 times, leaving a remainder of 24.
The number 2 becomes the next digit in our result. 
Result so far: 7961.7692
Subtracting 156 from 180 leaves us with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Moving on to step 11:
If we divide 240 by 78, we get 3 and a remainder of 6.
The number 3 becomes the next digit in our result. 
Result so far: 7961.76923
Subtracting 234 from 240 leaves us with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Moving on to step 12:
When dividing 60 by 78, we get 0 with a remainder of 60.
Write down 0 as next digit of the result. 
Result so far: 7961.76923
Subtracting 0 from 60 leaves us with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Step 13:
The number 78 fits into 600 7 times, leaving a remainder of 54.
Put 7 as the next digit of the answer. 
Result so far: 7961.7692307
Subtracting 546 from 600 leaves us 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 14:
78 can be fit into 540 6 times, resulting in a remainder of 72.
The next digit of our result is 6. 
Result so far: 7961.76923076
Subtract 468 from 540 to get 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

The quotient of the division is 7961.76923076, and the remainder is 7.2e-08.