We look at the division of 161968 by 51 
The aim is to understand the frequency of 51 in 161968.

Moving on to step 1:
If we divide 1 by 51, we get 0 and a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Include the next digit (6) from the dividend after 1, then repeat: 16 / 51

Advancing to step 2:
When dividing 16 by 51, we get 0 with a remainder of 16.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 16 to get 16.
Bring next digit (1) of the dividend behind the 16 and repeat the process: 161 / 51

Step 3:
51 can be fit into 161 3 times, resulting in a remainder of 8.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
Subtract 153 from 161 to get 8.
Fetch the next digit (9) from the dividend, attach it to 8 and continue: 89 / 51

Step 4:
When dividing 89 by 51, we get 1 with a remainder of 38.
The number 1 becomes the next digit in our result. 
Result so far: 31.0
Deduct 51 from 89 and we're left with 38.
Take the next digit (6) from the dividend and append it to 38, then repeat: 386 / 51

Advancing to step 5:
When dividing 386 by 51, we get 7 with a remainder of 29.
The number 7 becomes the next digit in our result. 
Result so far: 317.0
If we subtract 357 from 386, we get 29.
Append the next digit (8) from the dividend to 29 and continue with: 298 / 51

Let's proceed to step 6:
If we divide 298 by 51, we get 5 and a remainder of 43.
The number 5 becomes the next digit in our result. 
Result so far: 3175.0
Subtract 255 from 298 to get 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 7:
51 can be fit into 430 8 times, resulting in a remainder of 22.
Put 8 as the next digit of the answer. 
Result so far: 3175.8
Subtracting 408 from 430 leaves us with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Moving on to step 8:
The number 51 fits into 220 4 times, leaving a remainder of 16.
Record the quotient 4 as the next digit in the result. 
Result so far: 3175.84
The remainder is 16 after subtracting 204 from 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Moving on to step 9:
If we divide 160 by 51, we get 3 and a remainder of 7.
Write down 3 as next digit of the result. 
Result so far: 3175.843
Deduct 153 from 160 and we're left with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

On to step 10:
70 divided by 51 is 1 with a remainder of 19.
Record the quotient 1 as the next digit in the result. 
Result so far: 3175.8431
Subtract 51 from 70 to get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Step 11:
51 can be fit into 190 3 times, resulting in a remainder of 37.
Record the quotient 3 as the next digit in the result. 
Result so far: 3175.84313
Subtracting 153 from 190 leaves us 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.

Going ahead to step 12:
If we divide 370 by 51, we get 7 and a remainder of 13.
Use 7 as the next digit of our solution. 
Result so far: 3175.843137
The remainder is 13 after subtracting 357 from 370.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Moving on to step 13:
130 divided by 51 is 2 with a remainder of 28.
Put 2 as the next digit of the answer. 
Result so far: 3175.8431372
Subtract 102 from 130 to get 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Let's proceed to step 14:
The number 51 fits into 280 5 times, leaving a remainder of 25.
The next digit of our result is 5. 
Result so far: 3175.84313725
If we take 255 away from 280, we end up with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

After the division, we end up with 3175.84313725 and a remainder of 2.5e-08.