51871085 ÷ 966 
The aim is to understand the frequency of 966 in 51871085.

Step 1:
5 divided by 966 is 0 with a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Fetch the next digit (1) from the dividend, attach it to 5 and continue: 51 / 966

Let's proceed to step 2:
When dividing 51 by 966, we get 0 with a remainder of 51.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 51 leaves us with 51.
Fetch the next digit (8) from the dividend, attach it to 51 and continue: 518 / 966

Moving on to step 3:
When dividing 518 by 966, we get 0 with a remainder of 518.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 518, we end up with 518.
Fetch the next digit (7) from the dividend, attach it to 518 and continue: 5187 / 966

Advancing to step 4:
5187 divided by 966 is 5 with a remainder of 357.
Put 5 as the next digit of the answer. 
Result so far: 5.0
If we subtract 4830 from 5187, we get 357.
Fetch the next digit (1) from the dividend, attach it to 357 and continue: 3571 / 966

Let's proceed to step 5:
966 goes into 3571 3 times with a remainder of 673.
Use 3 as the next digit of our solution. 
Result so far: 53.0
If we take 2898 away from 3571, we end up with 673.
Include the next digit (0) from the dividend after 673, then repeat: 6730 / 966

Going ahead to step 6:
966 can be fit into 6730 6 times, resulting in a remainder of 934.
The number 6 becomes the next digit in our result. 
Result so far: 536.0
Subtracting 5796 from 6730 leaves us with 934.
Bring next digit (8) of the dividend behind the 934 and repeat the process: 9348 / 966

Let's proceed to step 7:
When dividing 9348 by 966, we get 9 with a remainder of 654.
Use 9 as the next digit of our solution. 
Result so far: 5369.0
The remainder is 654 after subtracting 8694 from 9348.
Grab the next digit (5) from the dividend, add it to 654, then carry on: 6545 / 966

Going ahead to step 8:
6545 divided by 966 is 6 with a remainder of 749.
The number 6 becomes the next digit in our result. 
Result so far: 53696.0
The remainder is 749 after subtracting 5796 from 6545.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7490, and continue the process.

Going ahead to step 9:
966 can be fit into 7490 7 times, resulting in a remainder of 728.
The next digit of our result is 7. 
Result so far: 53696.7
If we subtract 6762 from 7490, we get 728.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7280, and continue the process.

Going ahead to step 10:
The number 966 fits into 7280 7 times, leaving a remainder of 518.
Put 7 as the next digit of the answer. 
Result so far: 53696.77
The remainder is 518 after subtracting 6762 from 7280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5180, and continue the process.

The final result is 53696.77 with a remainder of 0.518.