We look at the division of 93590421 by 78 
The aim is to understand the frequency of 78 in 93590421.

Going ahead to step 1:
If we divide 9 by 78, we get 0 and a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 9, we end up with 9.
Bring next digit (3) of the dividend behind the 9 and repeat the process: 93 / 78

Advancing to step 2:
When dividing 93 by 78, we get 1 with a remainder of 15.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we take 78 away from 93, we end up with 15.
Bring next digit (5) of the dividend behind the 15 and repeat the process: 155 / 78

Step 3:
The number 78 fits into 155 1 times, leaving a remainder of 77.
The next digit of our result is 1. 
Result so far: 11.0
If we take 78 away from 155, we end up with 77.
Fetch the next digit (9) from the dividend, attach it to 77 and continue: 779 / 78

Advancing to step 4:
The number 78 fits into 779 9 times, leaving a remainder of 77.
Use 9 as the next digit of our solution. 
Result so far: 119.0
Subtracting 702 from 779 leaves us with 77.
Fetch the next digit (0) from the dividend, attach it to 77 and continue: 770 / 78

Step 5:
When dividing 770 by 78, we get 9 with a remainder of 68.
Write down 9 as next digit of the result. 
Result so far: 1199.0
Subtract 702 from 770 to get 68.
Take the next digit (4) from the dividend and append it to 68, then repeat: 684 / 78

Going ahead to step 6:
78 can be fit into 684 8 times, resulting in a remainder of 60.
Record the quotient 8 as the next digit in the result. 
Result so far: 11998.0
Deduct 624 from 684 and we're left with 60.
Bring next digit (2) of the dividend behind the 60 and repeat the process: 602 / 78

Let's proceed to step 7:
602 divided by 78 is 7 with a remainder of 56.
Record the quotient 7 as the next digit in the result. 
Result so far: 119987.0
Subtracting 546 from 602 leaves us with 56.
Bring next digit (1) of the dividend behind the 56 and repeat the process: 561 / 78

On to step 8:
When dividing 561 by 78, we get 7 with a remainder of 15.
The next digit of our result is 7. 
Result so far: 1199877.0
The remainder is 15 after subtracting 546 from 561.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

On to step 9:
78 can be fit into 150 1 times, resulting in a remainder of 72.
The number 1 becomes the next digit in our result. 
Result so far: 1199877.1
Subtract 78 from 150 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.

Moving on to step 10:
When dividing 720 by 78, we get 9 with a remainder of 18.
The next digit of our result is 9. 
Result so far: 1199877.19
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.

Advancing to step 11:
78 can be fit into 180 2 times, resulting in a remainder of 24.
The next digit of our result is 2. 
Result so far: 1199877.192
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.

Advancing to step 12:
78 goes into 240 3 times with a remainder of 6.
Put 3 as the next digit of the answer. 
Result so far: 1199877.1923
The remainder is 6 after subtracting 234 from 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Going ahead to step 13:
60 divided by 78 is 0 with a remainder of 60.
Put 0 as the next digit of the answer. 
Result so far: 1199877.1923
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 14:
When dividing 600 by 78, we get 7 with a remainder of 54.
Use 7 as the next digit of our solution. 
Result so far: 1199877.192307
Subtract 546 from 600 to get 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Step 15:
78 can be fit into 540 6 times, resulting in a remainder of 72.
The number 6 becomes the next digit in our result. 
Result so far: 1199877.1923076
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.

Going ahead to step 16:
78 can be fit into 720 9 times, resulting in a remainder of 18.
The number 9 becomes the next digit in our result. 
Result so far: 1199877.19230769
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.

Our division results in 1199877.19230769 with a remaining 1.8e-08.