369421 ÷ 78 
The aim is to understand the frequency of 78 in 369421.

Advancing to step 1:
78 goes into 3 0 times with a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Append the next digit (6) from the dividend to 3 and continue with: 36 / 78

Advancing to step 2:
The number 78 fits into 36 0 times, leaving a remainder of 36.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 36, we get 36.
Fetch the next digit (9) from the dividend, attach it to 36 and continue: 369 / 78

Moving on to step 3:
When dividing 369 by 78, we get 4 with a remainder of 57.
The next digit of our result is 4. 
Result so far: 4.0
The remainder is 57 after subtracting 312 from 369.
Fetch the next digit (4) from the dividend, attach it to 57 and continue: 574 / 78

Going ahead to step 4:
78 goes into 574 7 times with a remainder of 28.
The number 7 becomes the next digit in our result. 
Result so far: 47.0
If we subtract 546 from 574, we get 28.
Include the next digit (2) from the dividend after 28, then repeat: 282 / 78

Moving on to step 5:
78 goes into 282 3 times with a remainder of 48.
The number 3 becomes the next digit in our result. 
Result so far: 473.0
Subtract 234 from 282 to get 48.
Append the next digit (1) from the dividend to 48 and continue with: 481 / 78

Advancing to step 6:
When dividing 481 by 78, we get 6 with a remainder of 13.
Record the quotient 6 as the next digit in the result. 
Result so far: 4736.0
If we subtract 468 from 481, we get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

On to step 7:
78 goes into 130 1 times with a remainder of 52.
Put 1 as the next digit of the answer. 
Result so far: 4736.1
If we subtract 78 from 130, we get 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Going ahead to step 8:
78 can be fit into 520 6 times, resulting in a remainder of 52.
The number 6 becomes the next digit in our result. 
Result so far: 4736.16
Subtract 468 from 520 to get 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Going ahead to step 9:
The number 78 fits into 520 6 times, leaving a remainder of 52.
Record the quotient 6 as the next digit in the result. 
Result so far: 4736.166
The remainder is 52 after subtracting 468 from 520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Our division results in 4736.166 with a remaining 0.0052.