We look at the division of 786816 by 70 
The aim is to understand the frequency of 70 in 786816.

Step 1:
When dividing 7 by 70, we get 0 with a remainder of 7.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Append the next digit (8) from the dividend to 7 and continue with: 78 / 70

On to step 2:
70 can be fit into 78 1 times, resulting in a remainder of 8.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we subtract 70 from 78, we get 8.
Include the next digit (6) from the dividend after 8, then repeat: 86 / 70

Going ahead to step 3:
86 divided by 70 is 1 with a remainder of 16.
Use 1 as the next digit of our solution. 
Result so far: 11.0
Subtracting 70 from 86 leaves us with 16.
Fetch the next digit (8) from the dividend, attach it to 16 and continue: 168 / 70

Let's proceed to step 4:
When dividing 168 by 70, we get 2 with a remainder of 28.
Write down 2 as next digit of the result. 
Result so far: 112.0
The remainder is 28 after subtracting 140 from 168.
Include the next digit (1) from the dividend after 28, then repeat: 281 / 70

Going ahead to step 5:
If we divide 281 by 70, we get 4 and a remainder of 1.
The number 4 becomes the next digit in our result. 
Result so far: 1124.0
Subtracting 280 from 281 leaves us with 1.
Include the next digit (6) from the dividend after 1, then repeat: 16 / 70

Step 6:
70 goes into 16 0 times with a remainder of 16.
The number 0 becomes the next digit in our result. 
Result so far: 11240.0
Deduct 0 from 16 and we're left with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Advancing to step 7:
160 divided by 70 is 2 with a remainder of 20.
Use 2 as the next digit of our solution. 
Result so far: 11240.2
If we take 140 away from 160, 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.

Step 8:
200 divided by 70 is 2 with a remainder of 60.
Put 2 as the next digit of the answer. 
Result so far: 11240.22
Subtract 140 from 200 to get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

The final result is 11240.22 with a remainder of 0.06.