We look at the division of 2586316 by 486 
The aim is to understand the frequency of 486 in 2586316.

On to step 1:
The number 486 fits into 2 0 times, leaving a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Append the next digit (5) from the dividend to 2 and continue with: 25 / 486

Moving on to step 2:
486 goes into 25 0 times with a remainder of 25.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 25 after subtracting 0 from 25.
Include the next digit (8) from the dividend after 25, then repeat: 258 / 486

Advancing to step 3:
486 can be fit into 258 0 times, resulting in a remainder of 258.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 258 after subtracting 0 from 258.
Grab the next digit (6) from the dividend, add it to 258, then carry on: 2586 / 486

Going ahead to step 4:
When dividing 2586 by 486, we get 5 with a remainder of 156.
The number 5 becomes the next digit in our result. 
Result so far: 5.0
Deduct 2430 from 2586 and we're left with 156.
Append the next digit (3) from the dividend to 156 and continue with: 1563 / 486

Advancing to step 5:
The number 486 fits into 1563 3 times, leaving a remainder of 105.
The number 3 becomes the next digit in our result. 
Result so far: 53.0
The remainder is 105 after subtracting 1458 from 1563.
Fetch the next digit (1) from the dividend, attach it to 105 and continue: 1051 / 486

On to step 6:
1051 divided by 486 is 2 with a remainder of 79.
Put 2 as the next digit of the answer. 
Result so far: 532.0
Subtracting 972 from 1051 leaves us with 79.
Append the next digit (6) from the dividend to 79 and continue with: 796 / 486

Advancing to step 7:
486 can be fit into 796 1 times, resulting in a remainder of 310.
Put 1 as the next digit of the answer. 
Result so far: 5321.0
If we take 486 away from 796, we end up with 310.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3100, and continue the process.

Step 8:
486 goes into 3100 6 times with a remainder of 184.
Put 6 as the next digit of the answer. 
Result so far: 5321.6
The remainder is 184 after subtracting 2916 from 3100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1840, and continue the process.

Moving on to step 9:
486 goes into 1840 3 times with a remainder of 382.
Use 3 as the next digit of our solution. 
Result so far: 5321.63
If we subtract 1458 from 1840, we get 382.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3820, and continue the process.

Going ahead to step 10:
486 goes into 3820 7 times with a remainder of 418.
The next digit of our result is 7. 
Result so far: 5321.637
Subtracting 3402 from 3820 leaves us with 418.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4180, and continue the process.

Step 11:
4180 divided by 486 is 8 with a remainder of 292.
Write down 8 as next digit of the result. 
Result so far: 5321.6378
Subtract 3888 from 4180 to get 292.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2920, and continue the process.

Going ahead to step 12:
When dividing 2920 by 486, we get 6 with a remainder of 4.
The next digit of our result is 6. 
Result so far: 5321.63786
If we take 2916 away from 2920, we end up with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Going ahead to step 13:
40 divided by 486 is 0 with a remainder of 40.
The next digit of our result is 0. 
Result so far: 5321.63786
Subtract 0 from 40 to get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Step 14:
400 divided by 486 is 0 with a remainder of 400.
The next digit of our result is 0. 
Result so far: 5321.63786
Subtract 0 from 400 to get 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

The final result is 5321.63786 with a remainder of 4e-06.