8641720 ÷ 705 
The aim is to understand the frequency of 705 in 8641720.

Step 1:
The number 705 fits into 8 0 times, leaving a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Append the next digit (6) from the dividend to 8 and continue with: 86 / 705

Let's proceed to step 2:
When dividing 86 by 705, we get 0 with a remainder of 86.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 86 leaves us with 86.
Fetch the next digit (4) from the dividend, attach it to 86 and continue: 864 / 705

Step 3:
If we divide 864 by 705, we get 1 and a remainder of 159.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Deduct 705 from 864 and we're left with 159.
Append the next digit (1) from the dividend to 159 and continue with: 1591 / 705

Advancing to step 4:
705 can be fit into 1591 2 times, resulting in a remainder of 181.
The number 2 becomes the next digit in our result. 
Result so far: 12.0
If we take 1410 away from 1591, we end up with 181.
Append the next digit (7) from the dividend to 181 and continue with: 1817 / 705

Going ahead to step 5:
1817 divided by 705 is 2 with a remainder of 407.
Record the quotient 2 as the next digit in the result. 
Result so far: 122.0
Subtract 1410 from 1817 to get 407.
Take the next digit (2) from the dividend and append it to 407, then repeat: 4072 / 705

On to step 6:
705 can be fit into 4072 5 times, resulting in a remainder of 547.
The next digit of our result is 5. 
Result so far: 1225.0
If we subtract 3525 from 4072, we get 547.
Include the next digit (0) from the dividend after 547, then repeat: 5470 / 705

Moving on to step 7:
5470 divided by 705 is 7 with a remainder of 535.
The next digit of our result is 7. 
Result so far: 12257.0
If we take 4935 away from 5470, we end up with 535.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5350, and continue the process.

Going ahead to step 8:
The number 705 fits into 5350 7 times, leaving a remainder of 415.
The number 7 becomes the next digit in our result. 
Result so far: 12257.7
Subtracting 4935 from 5350 leaves us with 415.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4150, and continue the process.

On to step 9:
When dividing 4150 by 705, we get 5 with a remainder of 625.
The number 5 becomes the next digit in our result. 
Result so far: 12257.75
The remainder is 625 after subtracting 3525 from 4150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6250, and continue the process.

Step 10:
If we divide 6250 by 705, we get 8 and a remainder of 610.
Write down 8 as next digit of the result. 
Result so far: 12257.758
If we take 5640 away from 6250, we end up with 610.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6100, and continue the process.

Going ahead to step 11:
If we divide 6100 by 705, we get 8 and a remainder of 460.
The next digit of our result is 8. 
Result so far: 12257.7588
If we subtract 5640 from 6100, we get 460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4600, and continue the process.

The final outcome is 12257.7588, with a leftover of 0.0046.