We look at the division of 70781415 by 31 
The aim is to understand the frequency of 31 in 70781415.

Going ahead to step 1:
If we divide 7 by 31, we get 0 and a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Grab the next digit (0) from the dividend, add it to 7, then carry on: 70 / 31

Let's proceed to step 2:
31 can be fit into 70 2 times, resulting in a remainder of 8.
The next digit of our result is 2. 
Result so far: 2.0
Deduct 62 from 70 and we're left with 8.
Take the next digit (7) from the dividend and append it to 8, then repeat: 87 / 31

Let's proceed to step 3:
If we divide 87 by 31, we get 2 and a remainder of 25.
The number 2 becomes the next digit in our result. 
Result so far: 22.0
Subtract 62 from 87 to get 25.
Grab the next digit (8) from the dividend, add it to 25, then carry on: 258 / 31

Advancing to step 4:
258 divided by 31 is 8 with a remainder of 10.
Write down 8 as next digit of the result. 
Result so far: 228.0
If we take 248 away from 258, we end up with 10.
Bring next digit (1) of the dividend behind the 10 and repeat the process: 101 / 31

Going ahead to step 5:
The number 31 fits into 101 3 times, leaving a remainder of 8.
Record the quotient 3 as the next digit in the result. 
Result so far: 2283.0
If we subtract 93 from 101, we get 8.
Take the next digit (4) from the dividend and append it to 8, then repeat: 84 / 31

Let's proceed to step 6:
If we divide 84 by 31, we get 2 and a remainder of 22.
Use 2 as the next digit of our solution. 
Result so far: 22832.0
The remainder is 22 after subtracting 62 from 84.
Append the next digit (1) from the dividend to 22 and continue with: 221 / 31

Going ahead to step 7:
The number 31 fits into 221 7 times, leaving a remainder of 4.
Use 7 as the next digit of our solution. 
Result so far: 228327.0
The remainder is 4 after subtracting 217 from 221.
Append the next digit (5) from the dividend to 4 and continue with: 45 / 31

Let's proceed to step 8:
If we divide 45 by 31, we get 1 and a remainder of 14.
Put 1 as the next digit of the answer. 
Result so far: 2283271.0
If we take 31 away from 45, we end up 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.

Advancing to step 9:
31 goes into 140 4 times with a remainder of 16.
The number 4 becomes the next digit in our result. 
Result so far: 2283271.4
If we subtract 124 from 140, we get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Step 10:
160 divided by 31 is 5 with a remainder of 5.
Record the quotient 5 as the next digit in the result. 
Result so far: 2283271.45
If we subtract 155 from 160, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Step 11:
If we divide 50 by 31, we get 1 and a remainder of 19.
Write down 1 as next digit of the result. 
Result so far: 2283271.451
The remainder is 19 after subtracting 31 from 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Let's proceed to step 12:
When dividing 190 by 31, we get 6 with a remainder of 4.
The next digit of our result is 6. 
Result so far: 2283271.4516
Subtracting 186 from 190 leaves us 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.

Step 13:
If we divide 40 by 31, we get 1 and a remainder of 9.
The number 1 becomes the next digit in our result. 
Result so far: 2283271.45161
Subtract 31 from 40 to get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Advancing to step 14:
90 divided by 31 is 2 with a remainder of 28.
Put 2 as the next digit of the answer. 
Result so far: 2283271.451612
Subtract 62 from 90 to get 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

On to step 15:
31 goes into 280 9 times with a remainder of 1.
The number 9 becomes the next digit in our result. 
Result so far: 2283271.4516129
Deduct 279 from 280 and we're left with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

On to step 16:
If we divide 10 by 31, we get 0 and a remainder of 10.
The next digit of our result is 0. 
Result so far: 2283271.4516129
Subtract 0 from 10 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

The quotient of the division is 2283271.4516129, and the remainder is 1e-08.