We're dividing 86556409 by 850 
The aim is to understand the frequency of 850 in 86556409.

On to step 1:
The number 850 fits into 8 0 times, leaving a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Grab the next digit (6) from the dividend, add it to 8, then carry on: 86 / 850

Advancing to step 2:
86 divided by 850 is 0 with a remainder of 86.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 86, we get 86.
Append the next digit (5) from the dividend to 86 and continue with: 865 / 850

Going ahead to step 3:
The number 850 fits into 865 1 times, leaving a remainder of 15.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtracting 850 from 865 leaves us with 15.
Fetch the next digit (5) from the dividend, attach it to 15 and continue: 155 / 850

Let's proceed to step 4:
The number 850 fits into 155 0 times, leaving a remainder of 155.
Put 0 as the next digit of the answer. 
Result so far: 10.0
Subtracting 0 from 155 leaves us with 155.
Bring next digit (6) of the dividend behind the 155 and repeat the process: 1556 / 850

Going ahead to step 5:
When dividing 1556 by 850, we get 1 with a remainder of 706.
Record the quotient 1 as the next digit in the result. 
Result so far: 101.0
Subtract 850 from 1556 to get 706.
Grab the next digit (4) from the dividend, add it to 706, then carry on: 7064 / 850

Advancing to step 6:
The number 850 fits into 7064 8 times, leaving a remainder of 264.
The next digit of our result is 8. 
Result so far: 1018.0
Subtracting 6800 from 7064 leaves us with 264.
Take the next digit (0) from the dividend and append it to 264, then repeat: 2640 / 850

Advancing to step 7:
When dividing 2640 by 850, we get 3 with a remainder of 90.
Record the quotient 3 as the next digit in the result. 
Result so far: 10183.0
Subtracting 2550 from 2640 leaves us with 90.
Bring next digit (9) of the dividend behind the 90 and repeat the process: 909 / 850

Step 8:
The number 850 fits into 909 1 times, leaving a remainder of 59.
The number 1 becomes the next digit in our result. 
Result so far: 101831.0
If we take 850 away from 909, we end up with 59.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

On to step 9:
The number 850 fits into 590 0 times, leaving a remainder of 590.
Write down 0 as next digit of the result. 
Result so far: 101831.0
If we subtract 0 from 590, we get 590.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5900, and continue the process.

Moving on to step 10:
850 can be fit into 5900 6 times, resulting in a remainder of 800.
Record the quotient 6 as the next digit in the result. 
Result so far: 101831.06
Deduct 5100 from 5900 and we're left with 800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8000, and continue the process.

On to step 11:
When dividing 8000 by 850, we get 9 with a remainder of 350.
Use 9 as the next digit of our solution. 
Result so far: 101831.069
Deduct 7650 from 8000 and we're left with 350.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3500, and continue the process.

Moving on to step 12:
850 goes into 3500 4 times with a remainder of 100.
Put 4 as the next digit of the answer. 
Result so far: 101831.0694
If we subtract 3400 from 3500, we get 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Going ahead to step 13:
1000 divided by 850 is 1 with a remainder of 150.
Record the quotient 1 as the next digit in the result. 
Result so far: 101831.06941
If we take 850 away from 1000, we end up with 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1500, and continue the process.

Moving on to step 14:
When dividing 1500 by 850, we get 1 with a remainder of 650.
The next digit of our result is 1. 
Result so far: 101831.069411
If we take 850 away from 1500, we end up with 650.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6500, and continue the process.

After the division, we end up with 101831.069411 and a remainder of 6.5e-05.