Let's divide 16396775 by 426
The aim is to understand the frequency of 426 in 16396775.

Step 1:
The number 426 fits into 1 0 times, leaving a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Take the next digit (6) from the dividend and append it to 1, then repeat: 16 / 426

Moving on to step 2:
16 divided by 426 is 0 with a remainder of 16.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 16 leaves us with 16.
Grab the next digit (3) from the dividend, add it to 16, then carry on: 163 / 426

On to step 3:
426 can be fit into 163 0 times, resulting in a remainder of 163.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 163 after subtracting 0 from 163.
Include the next digit (9) from the dividend after 163, then repeat: 1639 / 426

Step 4:
426 can be fit into 1639 3 times, resulting in a remainder of 361.
Put 3 as the next digit of the answer. 
Result so far: 3.0
If we subtract 1278 from 1639, we get 361.
Bring next digit (6) of the dividend behind the 361 and repeat the process: 3616 / 426

On to step 5:
The number 426 fits into 3616 8 times, leaving a remainder of 208.
The number 8 becomes the next digit in our result. 
Result so far: 38.0
If we take 3408 away from 3616, we end up with 208.
Bring next digit (7) of the dividend behind the 208 and repeat the process: 2087 / 426

Step 6:
The number 426 fits into 2087 4 times, leaving a remainder of 383.
The next digit of our result is 4. 
Result so far: 384.0
Subtracting 1704 from 2087 leaves us with 383.
Fetch the next digit (7) from the dividend, attach it to 383 and continue: 3837 / 426

Going ahead to step 7:
426 can be fit into 3837 9 times, resulting in a remainder of 3.
Use 9 as the next digit of our solution. 
Result so far: 3849.0
If we subtract 3834 from 3837, we get 3.
Include the next digit (5) from the dividend after 3, then repeat: 35 / 426

Moving on to step 8:
35 divided by 426 is 0 with a remainder of 35.
The next digit of our result is 0. 
Result so far: 38490.0
Subtracting 0 from 35 leaves us with 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Step 9:
426 can be fit into 350 0 times, resulting in a remainder of 350.
Use 0 as the next digit of our solution. 
Result so far: 38490.0
If we take 0 away from 350, we end up 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.

Let's proceed to step 10:
When dividing 3500 by 426, we get 8 with a remainder of 92.
The number 8 becomes the next digit in our result. 
Result so far: 38490.08
Subtract 3408 from 3500 to get 92.
Since there are no more digits in the dividend, we add a zero to the remainder making it 920, and continue the process.

Moving on to step 11:
The number 426 fits into 920 2 times, leaving a remainder of 68.
Put 2 as the next digit of the answer. 
Result so far: 38490.082
If we take 852 away from 920, we end up with 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Moving on to step 12:
If we divide 680 by 426, we get 1 and a remainder of 254.
Record the quotient 1 as the next digit in the result. 
Result so far: 38490.0821
Subtracting 426 from 680 leaves us with 254.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2540, and continue the process.

Going ahead to step 13:
426 goes into 2540 5 times with a remainder of 410.
The next digit of our result is 5. 
Result so far: 38490.08215
Subtracting 2130 from 2540 leaves us with 410.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4100, and continue the process.

Going ahead to step 14:
If we divide 4100 by 426, we get 9 and a remainder of 266.
Put 9 as the next digit of the answer. 
Result so far: 38490.082159
Subtract 3834 from 4100 to get 266.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2660, and continue the process.

Moving on to step 15:
2660 divided by 426 is 6 with a remainder of 104.
The number 6 becomes the next digit in our result. 
Result so far: 38490.0821596
The remainder is 104 after subtracting 2556 from 2660.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1040, and continue the process.

Moving on to step 16:
426 can be fit into 1040 2 times, resulting in a remainder of 188.
Put 2 as the next digit of the answer. 
Result so far: 38490.08215962
Subtract 852 from 1040 to get 188.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1880, and continue the process.

The final result is 38490.08215962 with a remainder of 1.88e-07.