We look at the division of 813405 by 49 
The aim is to understand the frequency of 49 in 813405.

Let's proceed to step 1:
When dividing 8 by 49, we get 0 with a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Append the next digit (1) from the dividend to 8 and continue with: 81 / 49

Let's proceed to step 2:
The number 49 fits into 81 1 times, leaving a remainder of 32.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Deduct 49 from 81 and we're left with 32.
Append the next digit (3) from the dividend to 32 and continue with: 323 / 49

Going ahead to step 3:
If we divide 323 by 49, we get 6 and a remainder of 29.
The next digit of our result is 6. 
Result so far: 16.0
Subtracting 294 from 323 leaves us with 29.
Bring next digit (4) of the dividend behind the 29 and repeat the process: 294 / 49

Step 4:
294 divided by 49 is 6 with a remainder of 0.
Put 6 as the next digit of the answer. 
Result so far: 166.0
The remainder is 0 after subtracting 294 from 294.
Take the next digit (0) from the dividend and append it to 0, then repeat: 0 / 49

Moving on to step 5:
If we divide 0 by 49, we get 0 and a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 1660.0
Deduct 0 from 0 and we're left with 0.
Take the next digit (5) from the dividend and append it to 0, then repeat: 5 / 49

On to step 6:
5 divided by 49 is 0 with a remainder of 5.
The next digit of our result is 0. 
Result so far: 16600.0
The remainder is 5 after subtracting 0 from 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Advancing to step 7:
The number 49 fits into 50 1 times, leaving a remainder of 1.
Write down 1 as next digit of the result. 
Result so far: 16600.1
Deduct 49 from 50 and we're left with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

On to step 8:
10 divided by 49 is 0 with a remainder of 10.
Write down 0 as next digit of the result. 
Result so far: 16600.1
If we take 0 away from 10, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 9:
49 goes into 100 2 times with a remainder of 2.
Use 2 as the next digit of our solution. 
Result so far: 16600.102
If we take 98 away from 100, we end up with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Advancing to step 10:
If we divide 20 by 49, we get 0 and a remainder of 20.
The number 0 becomes the next digit in our result. 
Result so far: 16600.102
Deduct 0 from 20 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Let's proceed to step 11:
49 can be fit into 200 4 times, resulting in a remainder of 4.
Use 4 as the next digit of our solution. 
Result so far: 16600.10204
If we subtract 196 from 200, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Let's proceed to step 12:
40 divided by 49 is 0 with a remainder of 40.
Record the quotient 0 as the next digit in the result. 
Result so far: 16600.10204
Deduct 0 from 40 and we're left with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

On to step 13:
When dividing 400 by 49, we get 8 with a remainder of 8.
Use 8 as the next digit of our solution. 
Result so far: 16600.1020408
The remainder is 8 after subtracting 392 from 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

On to step 14:
80 divided by 49 is 1 with a remainder of 31.
The next digit of our result is 1. 
Result so far: 16600.10204081
If we subtract 49 from 80, we get 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

The quotient of the division is 16600.10204081, and the remainder is 3.1e-08.