We divide 78128373 by 408
The aim is to understand the frequency of 408 in 78128373.

Going ahead to step 1:
408 goes into 7 0 times with a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Take the next digit (8) from the dividend and append it to 7, then repeat: 78 / 408

Going ahead to step 2:
408 goes into 78 0 times with a remainder of 78.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 78 after subtracting 0 from 78.
Fetch the next digit (1) from the dividend, attach it to 78 and continue: 781 / 408

Let's proceed to step 3:
If we divide 781 by 408, we get 1 and a remainder of 373.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we take 408 away from 781, we end up with 373.
Include the next digit (2) from the dividend after 373, then repeat: 3732 / 408

Going ahead to step 4:
3732 divided by 408 is 9 with a remainder of 60.
Record the quotient 9 as the next digit in the result. 
Result so far: 19.0
Subtracting 3672 from 3732 leaves us with 60.
Grab the next digit (8) from the dividend, add it to 60, then carry on: 608 / 408

Moving on to step 5:
When dividing 608 by 408, we get 1 with a remainder of 200.
Put 1 as the next digit of the answer. 
Result so far: 191.0
If we subtract 408 from 608, we get 200.
Include the next digit (3) from the dividend after 200, then repeat: 2003 / 408

Advancing to step 6:
When dividing 2003 by 408, we get 4 with a remainder of 371.
The next digit of our result is 4. 
Result so far: 1914.0
Subtracting 1632 from 2003 leaves us with 371.
Append the next digit (7) from the dividend to 371 and continue with: 3717 / 408

Step 7:
The number 408 fits into 3717 9 times, leaving a remainder of 45.
Use 9 as the next digit of our solution. 
Result so far: 19149.0
If we take 3672 away from 3717, we end up with 45.
Include the next digit (3) from the dividend after 45, then repeat: 453 / 408

Moving on to step 8:
The number 408 fits into 453 1 times, leaving a remainder of 45.
Use 1 as the next digit of our solution. 
Result so far: 191491.0
Subtracting 408 from 453 leaves us with 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Moving on to step 9:
When dividing 450 by 408, we get 1 with a remainder of 42.
Use 1 as the next digit of our solution. 
Result so far: 191491.1
Subtracting 408 from 450 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.

Let's proceed to step 10:
420 divided by 408 is 1 with a remainder of 12.
Put 1 as the next digit of the answer. 
Result so far: 191491.11
Subtract 408 from 420 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

After the division, we end up with 191491.11 and a remainder of 0.012.