781614 divided by 31 
The aim is to understand the frequency of 31 in 781614.

Let's proceed to step 1:
When dividing 7 by 31, we get 0 with a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Bring next digit (8) of the dividend behind the 7 and repeat the process: 78 / 31

Step 2:
When dividing 78 by 31, we get 2 with a remainder of 16.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
If we take 62 away from 78, we end up with 16.
Append the next digit (1) from the dividend to 16 and continue with: 161 / 31

Moving on to step 3:
If we divide 161 by 31, we get 5 and a remainder of 6.
The next digit of our result is 5. 
Result so far: 25.0
Subtracting 155 from 161 leaves us with 6.
Take the next digit (6) from the dividend and append it to 6, then repeat: 66 / 31

Advancing to step 4:
31 can be fit into 66 2 times, resulting in a remainder of 4.
Write down 2 as next digit of the result. 
Result so far: 252.0
Deduct 62 from 66 and we're left with 4.
Fetch the next digit (1) from the dividend, attach it to 4 and continue: 41 / 31

Step 5:
31 goes into 41 1 times with a remainder of 10.
Write down 1 as next digit of the result. 
Result so far: 2521.0
If we take 31 away from 41, we end up with 10.
Include the next digit (4) from the dividend after 10, then repeat: 104 / 31

Advancing to step 6:
The number 31 fits into 104 3 times, leaving a remainder of 11.
Put 3 as the next digit of the answer. 
Result so far: 25213.0
Subtract 93 from 104 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.

Step 7:
31 can be fit into 110 3 times, resulting in a remainder of 17.
Use 3 as the next digit of our solution. 
Result so far: 25213.3
Deduct 93 from 110 and we're left with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Let's proceed to step 8:
When dividing 170 by 31, we get 5 with a remainder of 15.
The next digit of our result is 5. 
Result so far: 25213.35
If we take 155 away from 170, we end up with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Step 9:
When dividing 150 by 31, we get 4 with a remainder of 26.
Write down 4 as next digit of the result. 
Result so far: 25213.354
Subtract 124 from 150 to get 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Let's proceed to step 10:
31 can be fit into 260 8 times, resulting in a remainder of 12.
Use 8 as the next digit of our solution. 
Result so far: 25213.3548
If we subtract 248 from 260, we get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Moving on to step 11:
31 can be fit into 120 3 times, resulting in a remainder of 27.
The number 3 becomes the next digit in our result. 
Result so far: 25213.35483
The remainder is 27 after subtracting 93 from 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

On to step 12:
31 can be fit into 270 8 times, resulting in a remainder of 22.
The next digit of our result is 8. 
Result so far: 25213.354838
Deduct 248 from 270 and we're left with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Moving on to step 13:
If we divide 220 by 31, we get 7 and a remainder of 3.
Use 7 as the next digit of our solution. 
Result so far: 25213.3548387
Deduct 217 from 220 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.

Moving on to step 14:
31 goes into 30 0 times with a remainder of 30.
The number 0 becomes the next digit in our result. 
Result so far: 25213.3548387
If we take 0 away from 30, we end up 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.

After the division, we end up with 25213.3548387 and a remainder of 3e-08.