We look at the division of 10349365 by 406 
The aim is to understand the frequency of 406 in 10349365.

On to step 1:
406 can be fit into 1 0 times, resulting in a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Append the next digit (0) from the dividend to 1 and continue with: 10 / 406

On to step 2:
10 divided by 406 is 0 with a remainder of 10.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 10, we get 10.
Bring next digit (3) of the dividend behind the 10 and repeat the process: 103 / 406

Moving on to step 3:
103 divided by 406 is 0 with a remainder of 103.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 103 to get 103.
Fetch the next digit (4) from the dividend, attach it to 103 and continue: 1034 / 406

Going ahead to step 4:
406 goes into 1034 2 times with a remainder of 222.
Put 2 as the next digit of the answer. 
Result so far: 2.0
Subtract 812 from 1034 to get 222.
Take the next digit (9) from the dividend and append it to 222, then repeat: 2229 / 406

Step 5:
If we divide 2229 by 406, we get 5 and a remainder of 199.
Record the quotient 5 as the next digit in the result. 
Result so far: 25.0
Subtracting 2030 from 2229 leaves us with 199.
Include the next digit (3) from the dividend after 199, then repeat: 1993 / 406

Step 6:
1993 divided by 406 is 4 with a remainder of 369.
Use 4 as the next digit of our solution. 
Result so far: 254.0
Subtracting 1624 from 1993 leaves us with 369.
Include the next digit (6) from the dividend after 369, then repeat: 3696 / 406

Advancing to step 7:
406 can be fit into 3696 9 times, resulting in a remainder of 42.
Put 9 as the next digit of the answer. 
Result so far: 2549.0
Subtract 3654 from 3696 to get 42.
Bring next digit (5) of the dividend behind the 42 and repeat the process: 425 / 406

Advancing to step 8:
406 can be fit into 425 1 times, resulting in a remainder of 19.
The next digit of our result is 1. 
Result so far: 25491.0
If we subtract 406 from 425, we get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Step 9:
190 divided by 406 is 0 with a remainder of 190.
Write down 0 as next digit of the result. 
Result so far: 25491.0
Subtracting 0 from 190 leaves us with 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1900, and continue the process.

Going ahead to step 10:
When dividing 1900 by 406, we get 4 with a remainder of 276.
The next digit of our result is 4. 
Result so far: 25491.04
Subtract 1624 from 1900 to get 276.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2760, and continue the process.

Moving on to step 11:
When dividing 2760 by 406, we get 6 with a remainder of 324.
Record the quotient 6 as the next digit in the result. 
Result so far: 25491.046
The remainder is 324 after subtracting 2436 from 2760.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3240, and continue the process.

Going ahead to step 12:
3240 divided by 406 is 7 with a remainder of 398.
Use 7 as the next digit of our solution. 
Result so far: 25491.0467
Subtracting 2842 from 3240 leaves us with 398.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3980, and continue the process.

Going ahead to step 13:
406 goes into 3980 9 times with a remainder of 326.
Record the quotient 9 as the next digit in the result. 
Result so far: 25491.04679
Subtracting 3654 from 3980 leaves us with 326.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3260, and continue the process.

Going ahead to step 14:
When dividing 3260 by 406, we get 8 with a remainder of 12.
Write down 8 as next digit of the result. 
Result so far: 25491.046798
The remainder is 12 after subtracting 3248 from 3260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Advancing to step 15:
120 divided by 406 is 0 with a remainder of 120.
Write down 0 as next digit of the result. 
Result so far: 25491.046798
If we subtract 0 from 120, we get 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Moving on to step 16:
The number 406 fits into 1200 2 times, leaving a remainder of 388.
The next digit of our result is 2. 
Result so far: 25491.04679802
Subtract 812 from 1200 to get 388.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3880, and continue the process.

The final result is 25491.04679802 with a remainder of 3.88e-07.