Let's divide 638900 by 78
The aim is to understand the frequency of 78 in 638900.

Advancing to step 1:
If we divide 6 by 78, we get 0 and a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Take the next digit (3) from the dividend and append it to 6, then repeat: 63 / 78

Let's proceed to step 2:
If we divide 63 by 78, we get 0 and a remainder of 63.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 63, we end up with 63.
Fetch the next digit (8) from the dividend, attach it to 63 and continue: 638 / 78

Let's proceed to step 3:
When dividing 638 by 78, we get 8 with a remainder of 14.
The number 8 becomes the next digit in our result. 
Result so far: 8.0
Deduct 624 from 638 and we're left with 14.
Bring next digit (9) of the dividend behind the 14 and repeat the process: 149 / 78

Let's proceed to step 4:
78 can be fit into 149 1 times, resulting in a remainder of 71.
Put 1 as the next digit of the answer. 
Result so far: 81.0
If we take 78 away from 149, we end up with 71.
Include the next digit (0) from the dividend after 71, then repeat: 710 / 78

Let's proceed to step 5:
78 can be fit into 710 9 times, resulting in a remainder of 8.
Write down 9 as next digit of the result. 
Result so far: 819.0
Subtracting 702 from 710 leaves us with 8.
Fetch the next digit (0) from the dividend, attach it to 8 and continue: 80 / 78

On to step 6:
The number 78 fits into 80 1 times, leaving a remainder of 2.
Write down 1 as next digit of the result. 
Result so far: 8191.0
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.

Moving on to step 7:
78 can be fit into 20 0 times, resulting in a remainder of 20.
Use 0 as the next digit of our solution. 
Result so far: 8191.0
If we subtract 0 from 20, we get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Advancing to step 8:
The number 78 fits into 200 2 times, leaving a remainder of 44.
The next digit of our result is 2. 
Result so far: 8191.02
If we take 156 away from 200, we end up with 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Going ahead to step 9:
78 can be fit into 440 5 times, resulting in a remainder of 50.
The number 5 becomes the next digit in our result. 
Result so far: 8191.025
If we take 390 away from 440, we end up 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 10:
When dividing 500 by 78, we get 6 with a remainder of 32.
The number 6 becomes the next digit in our result. 
Result so far: 8191.0256
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.

Let's proceed to step 11:
The number 78 fits into 320 4 times, leaving a remainder of 8.
Use 4 as the next digit of our solution. 
Result so far: 8191.02564
If we take 312 away from 320, we end up with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

On to step 12:
78 goes into 80 1 times with a remainder of 2.
Use 1 as the next digit of our solution. 
Result so far: 8191.025641
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.

Advancing to step 13:
The number 78 fits into 20 0 times, leaving a remainder of 20.
Write down 0 as next digit of the result. 
Result so far: 8191.025641
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.

Advancing to step 14:
When dividing 200 by 78, we get 2 with a remainder of 44.
Put 2 as the next digit of the answer. 
Result so far: 8191.02564102
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.

After the division, we end up with 8191.02564102 and a remainder of 4.4e-08.