We're dividing 25415565 by 850 
The aim is to understand the frequency of 850 in 25415565.

On to step 1:
If we divide 2 by 850, we get 0 and a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Bring next digit (5) of the dividend behind the 2 and repeat the process: 25 / 850

On to step 2:
25 divided by 850 is 0 with a remainder of 25.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 25 to get 25.
Include the next digit (4) from the dividend after 25, then repeat: 254 / 850

Let's proceed to step 3:
850 goes into 254 0 times with a remainder of 254.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 254 and we're left with 254.
Grab the next digit (1) from the dividend, add it to 254, then carry on: 2541 / 850

Moving on to step 4:
850 can be fit into 2541 2 times, resulting in a remainder of 841.
The next digit of our result is 2. 
Result so far: 2.0
Deduct 1700 from 2541 and we're left with 841.
Take the next digit (5) from the dividend and append it to 841, then repeat: 8415 / 850

Step 5:
850 can be fit into 8415 9 times, resulting in a remainder of 765.
Record the quotient 9 as the next digit in the result. 
Result so far: 29.0
The remainder is 765 after subtracting 7650 from 8415.
Bring next digit (5) of the dividend behind the 765 and repeat the process: 7655 / 850

On to step 6:
If we divide 7655 by 850, we get 9 and a remainder of 5.
Record the quotient 9 as the next digit in the result. 
Result so far: 299.0
Deduct 7650 from 7655 and we're left with 5.
Bring next digit (6) of the dividend behind the 5 and repeat the process: 56 / 850

Moving on to step 7:
850 can be fit into 56 0 times, resulting in a remainder of 56.
Put 0 as the next digit of the answer. 
Result so far: 2990.0
If we take 0 away from 56, we end up with 56.
Bring next digit (5) of the dividend behind the 56 and repeat the process: 565 / 850

Going ahead to step 8:
850 can be fit into 565 0 times, resulting in a remainder of 565.
Put 0 as the next digit of the answer. 
Result so far: 29900.0
If we subtract 0 from 565, we get 565.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5650, and continue the process.

Going ahead to step 9:
The number 850 fits into 5650 6 times, leaving a remainder of 550.
The next digit of our result is 6. 
Result so far: 29900.6
If we take 5100 away from 5650, we end up with 550.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5500, and continue the process.

Let's proceed to step 10:
When dividing 5500 by 850, we get 6 with a remainder of 400.
Write down 6 as next digit of the result. 
Result so far: 29900.66
Deduct 5100 from 5500 and we're left with 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

In conclusion, the division gives 29900.66 with a balance of 0.4.