149786 ÷ 51 
The aim is to understand the frequency of 51 in 149786.

Step 1:
51 goes into 1 0 times with a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Fetch the next digit (4) from the dividend, attach it to 1 and continue: 14 / 51

Going ahead to step 2:
51 goes into 14 0 times with a remainder of 14.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 14, we get 14.
Include the next digit (9) from the dividend after 14, then repeat: 149 / 51

Advancing to step 3:
149 divided by 51 is 2 with a remainder of 47.
Write down 2 as next digit of the result. 
Result so far: 2.0
Deduct 102 from 149 and we're left with 47.
Take the next digit (7) from the dividend and append it to 47, then repeat: 477 / 51

Advancing to step 4:
477 divided by 51 is 9 with a remainder of 18.
The number 9 becomes the next digit in our result. 
Result so far: 29.0
Subtracting 459 from 477 leaves us with 18.
Take the next digit (8) from the dividend and append it to 18, then repeat: 188 / 51

On to step 5:
When dividing 188 by 51, we get 3 with a remainder of 35.
Use 3 as the next digit of our solution. 
Result so far: 293.0
If we subtract 153 from 188, we get 35.
Take the next digit (6) from the dividend and append it to 35, then repeat: 356 / 51

Moving on to step 6:
When dividing 356 by 51, we get 6 with a remainder of 50.
The number 6 becomes the next digit in our result. 
Result so far: 2936.0
The remainder is 50 after subtracting 306 from 356.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Moving on to step 7:
The number 51 fits into 500 9 times, leaving a remainder of 41.
Write down 9 as next digit of the result. 
Result so far: 2936.9
If we subtract 459 from 500, we get 41.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

Let's proceed to step 8:
51 can be fit into 410 8 times, resulting in a remainder of 2.
Record the quotient 8 as the next digit in the result. 
Result so far: 2936.98
Subtracting 408 from 410 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Advancing to step 9:
When dividing 20 by 51, we get 0 with a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 2936.98
Deduct 0 from 20 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Let's proceed to step 10:
51 can be fit into 200 3 times, resulting in a remainder of 47.
Record the quotient 3 as the next digit in the result. 
Result so far: 2936.9803
If we take 153 away from 200, we end up 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 11:
51 can be fit into 470 9 times, resulting in a remainder of 11.
The number 9 becomes the next digit in our result. 
Result so far: 2936.98039
Subtracting 459 from 470 leaves us with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Moving on to step 12:
If we divide 110 by 51, we get 2 and a remainder of 8.
Record the quotient 2 as the next digit in the result. 
Result so far: 2936.980392
Subtract 102 from 110 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Let's proceed to step 13:
When dividing 80 by 51, we get 1 with a remainder of 29.
Use 1 as the next digit of our solution. 
Result so far: 2936.9803921
Deduct 51 from 80 and we're left with 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Moving on to step 14:
If we divide 290 by 51, we get 5 and a remainder of 35.
Use 5 as the next digit of our solution. 
Result so far: 2936.98039215
Subtract 255 from 290 to 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.

The final result is 2936.98039215 with a remainder of 3.5e-08.