Let's divide 721100 by 78
The aim is to understand the frequency of 78 in 721100.

Going ahead to step 1:
If we divide 7 by 78, we get 0 and a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Grab the next digit (2) from the dividend, add it to 7, then carry on: 72 / 78

Step 2:
When dividing 72 by 78, we get 0 with a remainder of 72.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 72 after subtracting 0 from 72.
Grab the next digit (1) from the dividend, add it to 72, then carry on: 721 / 78

Going ahead to step 3:
721 divided by 78 is 9 with a remainder of 19.
The next digit of our result is 9. 
Result so far: 9.0
If we take 702 away from 721, we end up with 19.
Fetch the next digit (1) from the dividend, attach it to 19 and continue: 191 / 78

Let's proceed to step 4:
If we divide 191 by 78, we get 2 and a remainder of 35.
Put 2 as the next digit of the answer. 
Result so far: 92.0
If we take 156 away from 191, we end up with 35.
Grab the next digit (0) from the dividend, add it to 35, then carry on: 350 / 78

Moving on to step 5:
If we divide 350 by 78, we get 4 and a remainder of 38.
Use 4 as the next digit of our solution. 
Result so far: 924.0
Subtracting 312 from 350 leaves us with 38.
Append the next digit (0) from the dividend to 38 and continue with: 380 / 78

Advancing to step 6:
78 goes into 380 4 times with a remainder of 68.
The next digit of our result is 4. 
Result so far: 9244.0
Subtract 312 from 380 to get 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Advancing to step 7:
78 can be fit into 680 8 times, resulting in a remainder of 56.
Record the quotient 8 as the next digit in the result. 
Result so far: 9244.8
Subtracting 624 from 680 leaves us with 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Advancing to step 8:
560 divided by 78 is 7 with a remainder of 14.
The next digit of our result is 7. 
Result so far: 9244.87
Subtract 546 from 560 to get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Moving on to step 9:
78 goes into 140 1 times with a remainder of 62.
Use 1 as the next digit of our solution. 
Result so far: 9244.871
Deduct 78 from 140 and we're left with 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Let's proceed to step 10:
The number 78 fits into 620 7 times, leaving a remainder of 74.
The next digit of our result is 7. 
Result so far: 9244.8717
Deduct 546 from 620 and we're left with 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Moving on to step 11:
When dividing 740 by 78, we get 9 with a remainder of 38.
Record the quotient 9 as the next digit in the result. 
Result so far: 9244.87179
If we take 702 away from 740, we end up with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Going ahead to step 12:
78 can be fit into 380 4 times, resulting in a remainder of 68.
Write down 4 as next digit of the result. 
Result so far: 9244.871794
Deduct 312 from 380 and we're left with 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Step 13:
If we divide 680 by 78, we get 8 and a remainder of 56.
Use 8 as the next digit of our solution. 
Result so far: 9244.8717948
Subtracting 624 from 680 leaves us with 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Step 14:
When dividing 560 by 78, we get 7 with a remainder of 14.
The number 7 becomes the next digit in our result. 
Result so far: 9244.87179487
If we take 546 away from 560, we end up with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

The final outcome is 9244.87179487, with a leftover of 1.4e-08.