We look at the division of 723879 by 51 
The aim is to understand the frequency of 51 in 723879.

Moving on to step 1:
51 can be fit into 7 0 times, resulting in a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Grab the next digit (2) from the dividend, add it to 7, then carry on: 72 / 51

Advancing to step 2:
51 can be fit into 72 1 times, resulting in a remainder of 21.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtract 51 from 72 to get 21.
Bring next digit (3) of the dividend behind the 21 and repeat the process: 213 / 51

Going ahead to step 3:
51 can be fit into 213 4 times, resulting in a remainder of 9.
Record the quotient 4 as the next digit in the result. 
Result so far: 14.0
If we subtract 204 from 213, we get 9.
Bring next digit (8) of the dividend behind the 9 and repeat the process: 98 / 51

Advancing to step 4:
51 goes into 98 1 times with a remainder of 47.
The next digit of our result is 1. 
Result so far: 141.0
Deduct 51 from 98 and we're left with 47.
Grab the next digit (7) from the dividend, add it to 47, then carry on: 477 / 51

Let's proceed to step 5:
The number 51 fits into 477 9 times, leaving a remainder of 18.
Put 9 as the next digit of the answer. 
Result so far: 1419.0
If we take 459 away from 477, we end up with 18.
Bring next digit (9) of the dividend behind the 18 and repeat the process: 189 / 51

On to step 6:
51 goes into 189 3 times with a remainder of 36.
Write down 3 as next digit of the result. 
Result so far: 14193.0
If we take 153 away from 189, we end up with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Let's proceed to step 7:
360 divided by 51 is 7 with a remainder of 3.
Use 7 as the next digit of our solution. 
Result so far: 14193.7
If we take 357 away from 360, we end up with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Let's proceed to step 8:
51 goes into 30 0 times with a remainder of 30.
Record the quotient 0 as the next digit in the result. 
Result so far: 14193.7
Subtract 0 from 30 to get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Going ahead to step 9:
When dividing 300 by 51, we get 5 with a remainder of 45.
Write down 5 as next digit of the result. 
Result so far: 14193.705
Subtract 255 from 300 to get 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Let's proceed to step 10:
51 can be fit into 450 8 times, resulting in a remainder of 42.
Put 8 as the next digit of the answer. 
Result so far: 14193.7058
Subtracting 408 from 450 leaves us with 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Advancing to step 11:
When dividing 420 by 51, we get 8 with a remainder of 12.
Write down 8 as next digit of the result. 
Result so far: 14193.70588
Subtracting 408 from 420 leaves us with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Our division results in 14193.70588 with a remaining 1.2e-05.