We look at the division of 9448704 by 406 
The aim is to understand the frequency of 406 in 9448704.

On to step 1:
9 divided by 406 is 0 with a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 9, we end up with 9.
Fetch the next digit (4) from the dividend, attach it to 9 and continue: 94 / 406

Let's proceed to step 2:
The number 406 fits into 94 0 times, leaving a remainder of 94.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 94, we end up with 94.
Take the next digit (4) from the dividend and append it to 94, then repeat: 944 / 406

Advancing to step 3:
406 goes into 944 2 times with a remainder of 132.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
Deduct 812 from 944 and we're left with 132.
Grab the next digit (8) from the dividend, add it to 132, then carry on: 1328 / 406

On to step 4:
1328 divided by 406 is 3 with a remainder of 110.
The number 3 becomes the next digit in our result. 
Result so far: 23.0
Subtracting 1218 from 1328 leaves us with 110.
Grab the next digit (7) from the dividend, add it to 110, then carry on: 1107 / 406

On to step 5:
406 can be fit into 1107 2 times, resulting in a remainder of 295.
Record the quotient 2 as the next digit in the result. 
Result so far: 232.0
If we take 812 away from 1107, we end up with 295.
Include the next digit (0) from the dividend after 295, then repeat: 2950 / 406

Advancing to step 6:
406 goes into 2950 7 times with a remainder of 108.
Record the quotient 7 as the next digit in the result. 
Result so far: 2327.0
If we take 2842 away from 2950, we end up with 108.
Take the next digit (4) from the dividend and append it to 108, then repeat: 1084 / 406

Advancing to step 7:
406 can be fit into 1084 2 times, resulting in a remainder of 272.
Write down 2 as next digit of the result. 
Result so far: 23272.0
Subtracting 812 from 1084 leaves us with 272.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2720, and continue the process.

Advancing to step 8:
When dividing 2720 by 406, we get 6 with a remainder of 284.
Put 6 as the next digit of the answer. 
Result so far: 23272.6
If we subtract 2436 from 2720, we get 284.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2840, and continue the process.

Going ahead to step 9:
2840 divided by 406 is 6 with a remainder of 404.
Put 6 as the next digit of the answer. 
Result so far: 23272.66
Subtract 2436 from 2840 to get 404.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4040, and continue the process.

Our division results in 23272.66 with a remaining 0.404.