891315 ÷ 78 
The aim is to understand the frequency of 78 in 891315.

Advancing to step 1:
The number 78 fits into 8 0 times, leaving a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Take the next digit (9) from the dividend and append it to 8, then repeat: 89 / 78

Advancing to step 2:
78 can be fit into 89 1 times, resulting in a remainder of 11.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtracting 78 from 89 leaves us with 11.
Take the next digit (1) from the dividend and append it to 11, then repeat: 111 / 78

Let's proceed to step 3:
The number 78 fits into 111 1 times, leaving a remainder of 33.
Use 1 as the next digit of our solution. 
Result so far: 11.0
Subtracting 78 from 111 leaves us with 33.
Fetch the next digit (3) from the dividend, attach it to 33 and continue: 333 / 78

On to step 4:
78 can be fit into 333 4 times, resulting in a remainder of 21.
Use 4 as the next digit of our solution. 
Result so far: 114.0
If we subtract 312 from 333, we get 21.
Take the next digit (1) from the dividend and append it to 21, then repeat: 211 / 78

Step 5:
The number 78 fits into 211 2 times, leaving a remainder of 55.
The number 2 becomes the next digit in our result. 
Result so far: 1142.0
Subtract 156 from 211 to get 55.
Grab the next digit (5) from the dividend, add it to 55, then carry on: 555 / 78

Moving on to step 6:
78 can be fit into 555 7 times, resulting in a remainder of 9.
Put 7 as the next digit of the answer. 
Result so far: 11427.0
Subtract 546 from 555 to get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Step 7:
90 divided by 78 is 1 with a remainder of 12.
Use 1 as the next digit of our solution. 
Result so far: 11427.1
Deduct 78 from 90 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Advancing to step 8:
The number 78 fits into 120 1 times, leaving a remainder of 42.
Use 1 as the next digit of our solution. 
Result so far: 11427.11
Subtracting 78 from 120 leaves us with 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Our division results in 11427.11 with a remaining 0.042.