26597639 divided by 870 
The aim is to understand the frequency of 870 in 26597639.

Moving on to step 1:
When dividing 2 by 870, we get 0 with a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Fetch the next digit (6) from the dividend, attach it to 2 and continue: 26 / 870

Step 2:
When dividing 26 by 870, we get 0 with a remainder of 26.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 26 to get 26.
Fetch the next digit (5) from the dividend, attach it to 26 and continue: 265 / 870

Advancing to step 3:
870 can be fit into 265 0 times, resulting in a remainder of 265.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 265 and we're left with 265.
Grab the next digit (9) from the dividend, add it to 265, then carry on: 2659 / 870

Step 4:
870 goes into 2659 3 times with a remainder of 49.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
Subtract 2610 from 2659 to get 49.
Append the next digit (7) from the dividend to 49 and continue with: 497 / 870

On to step 5:
497 divided by 870 is 0 with a remainder of 497.
The next digit of our result is 0. 
Result so far: 30.0
Deduct 0 from 497 and we're left with 497.
Append the next digit (6) from the dividend to 497 and continue with: 4976 / 870

Advancing to step 6:
If we divide 4976 by 870, we get 5 and a remainder of 626.
Put 5 as the next digit of the answer. 
Result so far: 305.0
Subtracting 4350 from 4976 leaves us with 626.
Append the next digit (3) from the dividend to 626 and continue with: 6263 / 870

On to step 7:
6263 divided by 870 is 7 with a remainder of 173.
Write down 7 as next digit of the result. 
Result so far: 3057.0
The remainder is 173 after subtracting 6090 from 6263.
Include the next digit (9) from the dividend after 173, then repeat: 1739 / 870

Let's proceed to step 8:
The number 870 fits into 1739 1 times, leaving a remainder of 869.
Use 1 as the next digit of our solution. 
Result so far: 30571.0
If we take 870 away from 1739, we end up with 869.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8690, and continue the process.

Advancing to step 9:
The number 870 fits into 8690 9 times, leaving a remainder of 860.
Put 9 as the next digit of the answer. 
Result so far: 30571.9
The remainder is 860 after subtracting 7830 from 8690.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8600, and continue the process.

Step 10:
8600 divided by 870 is 9 with a remainder of 770.
Record the quotient 9 as the next digit in the result. 
Result so far: 30571.99
If we take 7830 away from 8600, we end up with 770.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7700, and continue the process.

The final outcome is 30571.99, with a leftover of 0.77.