870859 ÷ 64 
The aim is to understand the frequency of 64 in 870859.

Advancing to step 1:
When dividing 8 by 64, we get 0 with a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Include the next digit (7) from the dividend after 8, then repeat: 87 / 64

Moving on to step 2:
64 can be fit into 87 1 times, resulting in a remainder of 23.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we take 64 away from 87, we end up with 23.
Append the next digit (0) from the dividend to 23 and continue with: 230 / 64

Advancing to step 3:
If we divide 230 by 64, we get 3 and a remainder of 38.
Put 3 as the next digit of the answer. 
Result so far: 13.0
Subtracting 192 from 230 leaves us with 38.
Fetch the next digit (8) from the dividend, attach it to 38 and continue: 388 / 64

Moving on to step 4:
When dividing 388 by 64, we get 6 with a remainder of 4.
The number 6 becomes the next digit in our result. 
Result so far: 136.0
Subtract 384 from 388 to get 4.
Take the next digit (5) from the dividend and append it to 4, then repeat: 45 / 64

Going ahead to step 5:
64 goes into 45 0 times with a remainder of 45.
The number 0 becomes the next digit in our result. 
Result so far: 1360.0
If we subtract 0 from 45, we get 45.
Include the next digit (9) from the dividend after 45, then repeat: 459 / 64

Moving on to step 6:
459 divided by 64 is 7 with a remainder of 11.
Record the quotient 7 as the next digit in the result. 
Result so far: 13607.0
If we subtract 448 from 459, we get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Step 7:
If we divide 110 by 64, we get 1 and a remainder of 46.
The next digit of our result is 1. 
Result so far: 13607.1
Deduct 64 from 110 and we're left with 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Going ahead to step 8:
64 can be fit into 460 7 times, resulting in a remainder of 12.
Write down 7 as next digit of the result. 
Result so far: 13607.17
If we take 448 away from 460, we end up with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

On to step 9:
The number 64 fits into 120 1 times, leaving a remainder of 56.
Put 1 as the next digit of the answer. 
Result so far: 13607.171
If we take 64 away from 120, we end up 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.

Moving on to step 10:
560 divided by 64 is 8 with a remainder of 48.
Use 8 as the next digit of our solution. 
Result so far: 13607.1718
Subtracting 512 from 560 leaves us with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Step 11:
64 goes into 480 7 times with a remainder of 32.
Put 7 as the next digit of the answer. 
Result so far: 13607.17187
Deduct 448 from 480 and we're left with 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 12:
When dividing 320 by 64, we get 5 with a remainder of 0.
The next digit of our result is 5. 
Result so far: 13607.171875
If we take 320 away from 320, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 13:
The number 64 fits into 0 0 times, leaving a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 13607.171875
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 14:
0 divided by 64 is 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 13607.171875
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

After the division, we end up with 13607.171875 and a remainder of 0.0.