We look at the division of 34631673 by 816 
The aim is to understand the frequency of 816 in 34631673.

Moving on to step 1:
3 divided by 816 is 0 with a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Take the next digit (4) from the dividend and append it to 3, then repeat: 34 / 816

Moving on to step 2:
34 divided by 816 is 0 with a remainder of 34.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 34, we end up with 34.
Include the next digit (6) from the dividend after 34, then repeat: 346 / 816

Moving on to step 3:
816 can be fit into 346 0 times, resulting in a remainder of 346.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 346 leaves us with 346.
Bring next digit (3) of the dividend behind the 346 and repeat the process: 3463 / 816

Going ahead to step 4:
The number 816 fits into 3463 4 times, leaving a remainder of 199.
Use 4 as the next digit of our solution. 
Result so far: 4.0
If we subtract 3264 from 3463, we get 199.
Bring next digit (1) of the dividend behind the 199 and repeat the process: 1991 / 816

Advancing to step 5:
816 can be fit into 1991 2 times, resulting in a remainder of 359.
Put 2 as the next digit of the answer. 
Result so far: 42.0
Subtract 1632 from 1991 to get 359.
Append the next digit (6) from the dividend to 359 and continue with: 3596 / 816

Advancing to step 6:
816 can be fit into 3596 4 times, resulting in a remainder of 332.
Put 4 as the next digit of the answer. 
Result so far: 424.0
Subtract 3264 from 3596 to get 332.
Include the next digit (7) from the dividend after 332, then repeat: 3327 / 816

Advancing to step 7:
If we divide 3327 by 816, we get 4 and a remainder of 63.
Use 4 as the next digit of our solution. 
Result so far: 4244.0
Subtracting 3264 from 3327 leaves us with 63.
Bring next digit (3) of the dividend behind the 63 and repeat the process: 633 / 816

Going ahead to step 8:
The number 816 fits into 633 0 times, leaving a remainder of 633.
Put 0 as the next digit of the answer. 
Result so far: 42440.0
If we take 0 away from 633, we end up with 633.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6330, and continue the process.

Advancing to step 9:
816 goes into 6330 7 times with a remainder of 618.
The number 7 becomes the next digit in our result. 
Result so far: 42440.7
The remainder is 618 after subtracting 5712 from 6330.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6180, and continue the process.

Moving on to step 10:
816 goes into 6180 7 times with a remainder of 468.
Use 7 as the next digit of our solution. 
Result so far: 42440.77
Deduct 5712 from 6180 and we're left with 468.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4680, and continue the process.

The final result is 42440.77 with a remainder of 0.468.