We're dividing 972135 by 51 
The aim is to understand the frequency of 51 in 972135.

Going ahead to step 1:
The number 51 fits into 9 0 times, leaving 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.
Include the next digit (7) from the dividend after 9, then repeat: 97 / 51

Step 2:
When dividing 97 by 51, we get 1 with a remainder of 46.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtracting 51 from 97 leaves us with 46.
Fetch the next digit (2) from the dividend, attach it to 46 and continue: 462 / 51

Going ahead to step 3:
51 can be fit into 462 9 times, resulting in a remainder of 3.
The number 9 becomes the next digit in our result. 
Result so far: 19.0
Subtract 459 from 462 to get 3.
Append the next digit (1) from the dividend to 3 and continue with: 31 / 51

On to step 4:
31 divided by 51 is 0 with a remainder of 31.
Record the quotient 0 as the next digit in the result. 
Result so far: 190.0
Subtracting 0 from 31 leaves us with 31.
Bring next digit (3) of the dividend behind the 31 and repeat the process: 313 / 51

Advancing to step 5:
313 divided by 51 is 6 with a remainder of 7.
The number 6 becomes the next digit in our result. 
Result so far: 1906.0
Subtracting 306 from 313 leaves us with 7.
Grab the next digit (5) from the dividend, add it to 7, then carry on: 75 / 51

Advancing to step 6:
51 can be fit into 75 1 times, resulting in a remainder of 24.
The number 1 becomes the next digit in our result. 
Result so far: 19061.0
Deduct 51 from 75 and we're left with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

On to step 7:
51 can be fit into 240 4 times, resulting in a remainder of 36.
Put 4 as the next digit of the answer. 
Result so far: 19061.4
The remainder is 36 after subtracting 204 from 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Going ahead to step 8:
51 can be fit into 360 7 times, resulting in a remainder of 3.
The next digit of our result is 7. 
Result so far: 19061.47
Deduct 357 from 360 and we're left with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Step 9:
When dividing 30 by 51, we get 0 with a remainder of 30.
The next digit of our result is 0. 
Result so far: 19061.47
Deduct 0 from 30 and we're left with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Step 10:
300 divided by 51 is 5 with a remainder of 45.
Record the quotient 5 as the next digit in the result. 
Result so far: 19061.4705
If we take 255 away from 300, we end up with 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Advancing to step 11:
51 can be fit into 450 8 times, resulting in a remainder of 42.
The next digit of our result is 8. 
Result so far: 19061.47058
If we take 408 away from 450, we end up with 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Let's proceed to step 12:
The number 51 fits into 420 8 times, leaving a remainder of 12.
Use 8 as the next digit of our solution. 
Result so far: 19061.470588
If we take 408 away from 420, we end up with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Our division results in 19061.470588 with a remaining 1.2e-06.