285917 ÷ 78 
The aim is to understand the frequency of 78 in 285917.

Step 1:
If we divide 2 by 78, we get 0 and a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Grab the next digit (8) from the dividend, add it to 2, then carry on: 28 / 78

Advancing to step 2:
78 goes into 28 0 times with a remainder of 28.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 28 and we're left with 28.
Fetch the next digit (5) from the dividend, attach it to 28 and continue: 285 / 78

Going ahead to step 3:
285 divided by 78 is 3 with a remainder of 51.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
Subtract 234 from 285 to get 51.
Include the next digit (9) from the dividend after 51, then repeat: 519 / 78

Let's proceed to step 4:
The number 78 fits into 519 6 times, leaving a remainder of 51.
The next digit of our result is 6. 
Result so far: 36.0
Subtract 468 from 519 to get 51.
Bring next digit (1) of the dividend behind the 51 and repeat the process: 511 / 78

On to step 5:
78 can be fit into 511 6 times, resulting in a remainder of 43.
Record the quotient 6 as the next digit in the result. 
Result so far: 366.0
If we subtract 468 from 511, we get 43.
Grab the next digit (7) from the dividend, add it to 43, then carry on: 437 / 78

Let's proceed to step 6:
78 can be fit into 437 5 times, resulting in a remainder of 47.
Write down 5 as next digit of the result. 
Result so far: 3665.0
The remainder is 47 after subtracting 390 from 437.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

Advancing to step 7:
When dividing 470 by 78, we get 6 with a remainder of 2.
Put 6 as the next digit of the answer. 
Result so far: 3665.6
Subtracting 468 from 470 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Moving on to step 8:
78 goes into 20 0 times with a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 3665.6
Subtracting 0 from 20 leaves us with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Moving on to step 9:
The number 78 fits into 200 2 times, leaving a remainder of 44.
The next digit of our result is 2. 
Result so far: 3665.602
The remainder is 44 after subtracting 156 from 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Step 10:
When dividing 440 by 78, we get 5 with a remainder of 50.
Use 5 as the next digit of our solution. 
Result so far: 3665.6025
Subtracting 390 from 440 leaves us with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Moving on to step 11:
If we divide 500 by 78, we get 6 and a remainder of 32.
Record the quotient 6 as the next digit in the result. 
Result so far: 3665.60256
If we subtract 468 from 500, we get 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Going ahead to step 12:
320 divided by 78 is 4 with a remainder of 8.
Use 4 as the next digit of our solution. 
Result so far: 3665.602564
Subtract 312 from 320 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Advancing to step 13:
The number 78 fits into 80 1 times, leaving a remainder of 2.
Use 1 as the next digit of our solution. 
Result so far: 3665.6025641
The remainder is 2 after subtracting 78 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

On to step 14:
78 goes into 20 0 times with a remainder of 20.
The next digit of our result is 0. 
Result so far: 3665.6025641
If we take 0 away from 20, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

The quotient of the division is 3665.6025641, and the remainder is 2e-08.