Let's divide 31609709 by 850
The aim is to understand the frequency of 850 in 31609709.

Step 1:
850 can be fit into 3 0 times, resulting in a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Include the next digit (1) from the dividend after 3, then repeat: 31 / 850

Moving on to step 2:
When dividing 31 by 850, we get 0 with a remainder of 31.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 31, we end up with 31.
Grab the next digit (6) from the dividend, add it to 31, then carry on: 316 / 850

On to step 3:
If we divide 316 by 850, we get 0 and a remainder of 316.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 316 and we're left with 316.
Include the next digit (0) from the dividend after 316, then repeat: 3160 / 850

On to step 4:
When dividing 3160 by 850, we get 3 with a remainder of 610.
Use 3 as the next digit of our solution. 
Result so far: 3.0
Deduct 2550 from 3160 and we're left with 610.
Bring next digit (9) of the dividend behind the 610 and repeat the process: 6109 / 850

Going ahead to step 5:
The number 850 fits into 6109 7 times, leaving a remainder of 159.
The number 7 becomes the next digit in our result. 
Result so far: 37.0
Subtracting 5950 from 6109 leaves us with 159.
Fetch the next digit (7) from the dividend, attach it to 159 and continue: 1597 / 850

Moving on to step 6:
If we divide 1597 by 850, we get 1 and a remainder of 747.
Put 1 as the next digit of the answer. 
Result so far: 371.0
If we subtract 850 from 1597, we get 747.
Bring next digit (0) of the dividend behind the 747 and repeat the process: 7470 / 850

Moving on to step 7:
The number 850 fits into 7470 8 times, leaving a remainder of 670.
Put 8 as the next digit of the answer. 
Result so far: 3718.0
If we subtract 6800 from 7470, we get 670.
Grab the next digit (9) from the dividend, add it to 670, then carry on: 6709 / 850

Moving on to step 8:
If we divide 6709 by 850, we get 7 and a remainder of 759.
Write down 7 as next digit of the result. 
Result so far: 37187.0
If we subtract 5950 from 6709, we get 759.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7590, and continue the process.

Step 9:
850 can be fit into 7590 8 times, resulting in a remainder of 790.
Record the quotient 8 as the next digit in the result. 
Result so far: 37187.8
Subtract 6800 from 7590 to get 790.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7900, and continue the process.

On to step 10:
7900 divided by 850 is 9 with a remainder of 250.
The next digit of our result is 9. 
Result so far: 37187.89
If we take 7650 away from 7900, we end up with 250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2500, and continue the process.

Advancing to step 11:
The number 850 fits into 2500 2 times, leaving a remainder of 800.
The next digit of our result is 2. 
Result so far: 37187.892
Subtracting 1700 from 2500 leaves us 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.

Let's proceed to step 12:
If we divide 8000 by 850, we get 9 and a remainder of 350.
Record the quotient 9 as the next digit in the result. 
Result so far: 37187.8929
If we subtract 7650 from 8000, we get 350.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3500, and continue the process.

Advancing to step 13:
850 goes into 3500 4 times with a remainder of 100.
The next digit of our result is 4. 
Result so far: 37187.89294
If we take 3400 away from 3500, we end up with 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 14:
When dividing 1000 by 850, we get 1 with a remainder of 150.
The next digit of our result is 1. 
Result so far: 37187.892941
Deduct 850 from 1000 and we're left 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.

On to step 15:
850 can be fit into 1500 1 times, resulting in a remainder of 650.
The next digit of our result is 1. 
Result so far: 37187.8929411
Subtract 850 from 1500 to get 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 37187.8929411 and a remainder of 6.5e-06.