We're dividing 801737 by 51 
The aim is to understand the frequency of 51 in 801737.

Step 1:
When dividing 8 by 51, we get 0 with a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Include the next digit (0) from the dividend after 8, then repeat: 80 / 51

Moving on to step 2:
If we divide 80 by 51, we get 1 and a remainder of 29.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Deduct 51 from 80 and we're left with 29.
Grab the next digit (1) from the dividend, add it to 29, then carry on: 291 / 51

Moving on to step 3:
The number 51 fits into 291 5 times, leaving a remainder of 36.
Record the quotient 5 as the next digit in the result. 
Result so far: 15.0
Deduct 255 from 291 and we're left with 36.
Fetch the next digit (7) from the dividend, attach it to 36 and continue: 367 / 51

Let's proceed to step 4:
When dividing 367 by 51, we get 7 with a remainder of 10.
The next digit of our result is 7. 
Result so far: 157.0
The remainder is 10 after subtracting 357 from 367.
Grab the next digit (3) from the dividend, add it to 10, then carry on: 103 / 51

Moving on to step 5:
When dividing 103 by 51, we get 2 with a remainder of 1.
Write down 2 as next digit of the result. 
Result so far: 1572.0
The remainder is 1 after subtracting 102 from 103.
Include the next digit (7) from the dividend after 1, then repeat: 17 / 51

Advancing to step 6:
The number 51 fits into 17 0 times, leaving a remainder of 17.
Write down 0 as next digit of the result. 
Result so far: 15720.0
The remainder is 17 after subtracting 0 from 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Moving on to step 7:
170 divided by 51 is 3 with a remainder of 17.
Put 3 as the next digit of the answer. 
Result so far: 15720.3
Subtract 153 from 170 to get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Step 8:
170 divided by 51 is 3 with a remainder of 17.
The number 3 becomes the next digit in our result. 
Result so far: 15720.33
The remainder is 17 after subtracting 153 from 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

In conclusion, the division gives 15720.33 with a balance of 0.017.