We look at the division of 90290 by 51 
The aim is to understand the frequency of 51 in 90290.

Moving on to step 1:
If we divide 9 by 51, we get 0 and a remainder of 9.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 9 and we're left with 9.
Take the next digit (0) from the dividend and append it to 9, then repeat: 90 / 51

Going ahead to step 2:
The number 51 fits into 90 1 times, leaving a remainder of 39.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtracting 51 from 90 leaves us with 39.
Take the next digit (2) from the dividend and append it to 39, then repeat: 392 / 51

Moving on to step 3:
392 divided by 51 is 7 with a remainder of 35.
Write down 7 as next digit of the result. 
Result so far: 17.0
The remainder is 35 after subtracting 357 from 392.
Grab the next digit (9) from the dividend, add it to 35, then carry on: 359 / 51

Going ahead to step 4:
51 goes into 359 7 times with a remainder of 2.
The next digit of our result is 7. 
Result so far: 177.0
Subtract 357 from 359 to get 2.
Include the next digit (0) from the dividend after 2, then repeat: 20 / 51

Step 5:
20 divided by 51 is 0 with a remainder of 20.
Put 0 as the next digit of the answer. 
Result so far: 1770.0
If we take 0 away from 20, we end up 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.

On to step 6:
200 divided by 51 is 3 with a remainder of 47.
Use 3 as the next digit of our solution. 
Result so far: 1770.3
The remainder is 47 after subtracting 153 from 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

On to step 7:
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: 1770.39
Subtract 459 from 470 to get 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 8:
110 divided by 51 is 2 with a remainder of 8.
The next digit of our result is 2. 
Result so far: 1770.392
Deduct 102 from 110 and we're left 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.

Advancing to step 9:
80 divided by 51 is 1 with a remainder of 29.
The next digit of our result is 1. 
Result so far: 1770.3921
If we subtract 51 from 80, we get 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Advancing to step 10:
When dividing 290 by 51, we get 5 with a remainder of 35.
The next digit of our result is 5. 
Result so far: 1770.39215
Deduct 255 from 290 and we're left with 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

On to step 11:
51 can be fit into 350 6 times, resulting in a remainder of 44.
Record the quotient 6 as the next digit in the result. 
Result so far: 1770.392156
If we take 306 away from 350, we end up with 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:
When dividing 440 by 51, we get 8 with a remainder of 32.
The number 8 becomes the next digit in our result. 
Result so far: 1770.3921568
Subtract 408 from 440 to get 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Advancing to step 13:
320 divided by 51 is 6 with a remainder of 14.
Put 6 as the next digit of the answer. 
Result so far: 1770.39215686
Subtracting 306 from 320 leaves us with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

The quotient of the division is 1770.39215686, and the remainder is 1.4e-08.