We look at the division of 851813 by 49 
The aim is to understand the frequency of 49 in 851813.

Going ahead to step 1:
8 divided by 49 is 0 with a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Include the next digit (5) from the dividend after 8, then repeat: 85 / 49

Let's proceed to step 2:
85 divided by 49 is 1 with a remainder of 36.
The next digit of our result is 1. 
Result so far: 1.0
If we subtract 49 from 85, we get 36.
Include the next digit (1) from the dividend after 36, then repeat: 361 / 49

Moving on to step 3:
If we divide 361 by 49, we get 7 and a remainder of 18.
Record the quotient 7 as the next digit in the result. 
Result so far: 17.0
Subtract 343 from 361 to get 18.
Grab the next digit (8) from the dividend, add it to 18, then carry on: 188 / 49

Going ahead to step 4:
When dividing 188 by 49, we get 3 with a remainder of 41.
The next digit of our result is 3. 
Result so far: 173.0
Deduct 147 from 188 and we're left with 41.
Grab the next digit (1) from the dividend, add it to 41, then carry on: 411 / 49

On to step 5:
The number 49 fits into 411 8 times, leaving a remainder of 19.
Write down 8 as next digit of the result. 
Result so far: 1738.0
If we take 392 away from 411, we end up with 19.
Take the next digit (3) from the dividend and append it to 19, then repeat: 193 / 49

Moving on to step 6:
The number 49 fits into 193 3 times, leaving a remainder of 46.
Write down 3 as next digit of the result. 
Result so far: 17383.0
Subtract 147 from 193 to get 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

On to step 7:
The number 49 fits into 460 9 times, leaving a remainder of 19.
Write down 9 as next digit of the result. 
Result so far: 17383.9
Subtracting 441 from 460 leaves us with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Going ahead to step 8:
49 goes into 190 3 times with a remainder of 43.
The next digit of our result is 3. 
Result so far: 17383.93
Subtracting 147 from 190 leaves us with 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

On to step 9:
If we divide 430 by 49, we get 8 and a remainder of 38.
The number 8 becomes the next digit in our result. 
Result so far: 17383.938
Deduct 392 from 430 and we're left with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Going ahead to step 10:
If we divide 380 by 49, we get 7 and a remainder of 37.
Put 7 as the next digit of the answer. 
Result so far: 17383.9387
If we take 343 away from 380, we end up with 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

On to step 11:
49 goes into 370 7 times with a remainder of 27.
Record the quotient 7 as the next digit in the result. 
Result so far: 17383.93877
Subtracting 343 from 370 leaves us with 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

The final outcome is 17383.93877, with a leftover of 2.7e-05.