We divide 16409881 by 394
The aim is to understand the frequency of 394 in 16409881.

On to step 1:
When dividing 1 by 394, we get 0 with a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Grab the next digit (6) from the dividend, add it to 1, then carry on: 16 / 394

Going ahead to step 2:
394 goes into 16 0 times with a remainder of 16.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 16 after subtracting 0 from 16.
Bring next digit (4) of the dividend behind the 16 and repeat the process: 164 / 394

Advancing to step 3:
394 can be fit into 164 0 times, resulting in a remainder of 164.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 164 after subtracting 0 from 164.
Append the next digit (0) from the dividend to 164 and continue with: 1640 / 394

Step 4:
When dividing 1640 by 394, we get 4 with a remainder of 64.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
Subtract 1576 from 1640 to get 64.
Fetch the next digit (9) from the dividend, attach it to 64 and continue: 649 / 394

On to step 5:
394 goes into 649 1 times with a remainder of 255.
Write down 1 as next digit of the result. 
Result so far: 41.0
If we take 394 away from 649, we end up with 255.
Include the next digit (8) from the dividend after 255, then repeat: 2558 / 394

Going ahead to step 6:
394 can be fit into 2558 6 times, resulting in a remainder of 194.
Use 6 as the next digit of our solution. 
Result so far: 416.0
If we subtract 2364 from 2558, we get 194.
Grab the next digit (8) from the dividend, add it to 194, then carry on: 1948 / 394

Let's proceed to step 7:
1948 divided by 394 is 4 with a remainder of 372.
The next digit of our result is 4. 
Result so far: 4164.0
Subtracting 1576 from 1948 leaves us with 372.
Append the next digit (1) from the dividend to 372 and continue with: 3721 / 394

On to step 8:
394 can be fit into 3721 9 times, resulting in a remainder of 175.
Use 9 as the next digit of our solution. 
Result so far: 41649.0
Deduct 3546 from 3721 and we're left with 175.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1750, and continue the process.

On to step 9:
When dividing 1750 by 394, we get 4 with a remainder of 174.
Use 4 as the next digit of our solution. 
Result so far: 41649.4
Subtract 1576 from 1750 to get 174.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1740, and continue the process.

Step 10:
When dividing 1740 by 394, we get 4 with a remainder of 164.
Use 4 as the next digit of our solution. 
Result so far: 41649.44
Deduct 1576 from 1740 and we're left with 164.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1640, and continue the process.

Our division results in 41649.44 with a remaining 0.164.