159881 ÷ 51 
The aim is to understand the frequency of 51 in 159881.

Let's proceed to step 1:
If we divide 1 by 51, we get 0 and a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Bring next digit (5) of the dividend behind the 1 and repeat the process: 15 / 51

On to step 2:
51 can be fit into 15 0 times, resulting in a remainder of 15.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 15, we end up with 15.
Grab the next digit (9) from the dividend, add it to 15, then carry on: 159 / 51

Advancing to step 3:
When dividing 159 by 51, we get 3 with a remainder of 6.
Write down 3 as next digit of the result. 
Result so far: 3.0
Subtract 153 from 159 to get 6.
Append the next digit (8) from the dividend to 6 and continue with: 68 / 51

Moving on to step 4:
If we divide 68 by 51, we get 1 and a remainder of 17.
Record the quotient 1 as the next digit in the result. 
Result so far: 31.0
If we take 51 away from 68, we end up with 17.
Bring next digit (8) of the dividend behind the 17 and repeat the process: 178 / 51

Moving on to step 5:
51 can be fit into 178 3 times, resulting in a remainder of 25.
Record the quotient 3 as the next digit in the result. 
Result so far: 313.0
Subtract 153 from 178 to get 25.
Fetch the next digit (1) from the dividend, attach it to 25 and continue: 251 / 51

Let's proceed to step 6:
The number 51 fits into 251 4 times, leaving a remainder of 47.
Put 4 as the next digit of the answer. 
Result so far: 3134.0
Subtracting 204 from 251 leaves us with 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

Step 7:
When dividing 470 by 51, we get 9 with a remainder of 11.
Write down 9 as next digit of the result. 
Result so far: 3134.9
The remainder is 11 after subtracting 459 from 470.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Advancing to step 8:
The number 51 fits into 110 2 times, leaving a remainder of 8.
Put 2 as the next digit of the answer. 
Result so far: 3134.92
Subtracting 102 from 110 leaves us with 8.
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 9:
The number 51 fits into 80 1 times, leaving a remainder of 29.
Write down 1 as next digit of the result. 
Result so far: 3134.921
The remainder is 29 after subtracting 51 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

On to step 10:
The number 51 fits into 290 5 times, leaving a remainder of 35.
The next digit of our result is 5. 
Result so far: 3134.9215
If we subtract 255 from 290, we get 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Moving on to step 11:
51 goes into 350 6 times with a remainder of 44.
Write down 6 as next digit of the result. 
Result so far: 3134.92156
If we subtract 306 from 350, we get 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Step 12:
51 goes into 440 8 times with a remainder of 32.
Record the quotient 8 as the next digit in the result. 
Result so far: 3134.921568
Subtracting 408 from 440 leaves us with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Step 13:
The number 51 fits into 320 6 times, leaving a remainder of 14.
Write down 6 as next digit of the result. 
Result so far: 3134.9215686
If we subtract 306 from 320, we get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Going ahead to step 14:
51 goes into 140 2 times with a remainder of 38.
Record the quotient 2 as the next digit in the result. 
Result so far: 3134.92156862
The remainder is 38 after subtracting 102 from 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

The quotient of the division is 3134.92156862, and the remainder is 3.8e-08.