We're dividing 71231386 by 251 
The aim is to understand the frequency of 251 in 71231386.

Moving on to step 1:
The number 251 fits into 7 0 times, leaving a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Bring next digit (1) of the dividend behind the 7 and repeat the process: 71 / 251

Step 2:
When dividing 71 by 251, we get 0 with a remainder of 71.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 71, we get 71.
Take the next digit (2) from the dividend and append it to 71, then repeat: 712 / 251

Moving on to step 3:
The number 251 fits into 712 2 times, leaving a remainder of 210.
Put 2 as the next digit of the answer. 
Result so far: 2.0
The remainder is 210 after subtracting 502 from 712.
Bring next digit (3) of the dividend behind the 210 and repeat the process: 2103 / 251

Step 4:
If we divide 2103 by 251, we get 8 and a remainder of 95.
Write down 8 as next digit of the result. 
Result so far: 28.0
Subtract 2008 from 2103 to get 95.
Append the next digit (1) from the dividend to 95 and continue with: 951 / 251

Going ahead to step 5:
251 goes into 951 3 times with a remainder of 198.
Put 3 as the next digit of the answer. 
Result so far: 283.0
Subtracting 753 from 951 leaves us with 198.
Grab the next digit (3) from the dividend, add it to 198, then carry on: 1983 / 251

Step 6:
The number 251 fits into 1983 7 times, leaving a remainder of 226.
The next digit of our result is 7. 
Result so far: 2837.0
If we subtract 1757 from 1983, we get 226.
Fetch the next digit (8) from the dividend, attach it to 226 and continue: 2268 / 251

Let's proceed to step 7:
2268 divided by 251 is 9 with a remainder of 9.
Write down 9 as next digit of the result. 
Result so far: 28379.0
Subtract 2259 from 2268 to get 9.
Append the next digit (6) from the dividend to 9 and continue with: 96 / 251

Going ahead to step 8:
96 divided by 251 is 0 with a remainder of 96.
Put 0 as the next digit of the answer. 
Result so far: 283790.0
Subtract 0 from 96 to get 96.
Since there are no more digits in the dividend, we add a zero to the remainder making it 960, and continue the process.

Step 9:
When dividing 960 by 251, we get 3 with a remainder of 207.
Put 3 as the next digit of the answer. 
Result so far: 283790.3
Subtract 753 from 960 to get 207.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2070, and continue the process.

Step 10:
When dividing 2070 by 251, we get 8 with a remainder of 62.
Write down 8 as next digit of the result. 
Result so far: 283790.38
If we subtract 2008 from 2070, we get 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Going ahead to step 11:
251 goes into 620 2 times with a remainder of 118.
The number 2 becomes the next digit in our result. 
Result so far: 283790.382
If we take 502 away from 620, we end up with 118.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1180, and continue the process.

Advancing to step 12:
When dividing 1180 by 251, we get 4 with a remainder of 176.
Record the quotient 4 as the next digit in the result. 
Result so far: 283790.3824
Deduct 1004 from 1180 and we're left with 176.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1760, and continue the process.

Step 13:
1760 divided by 251 is 7 with a remainder of 3.
Put 7 as the next digit of the answer. 
Result so far: 283790.38247
The remainder is 3 after subtracting 1757 from 1760.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Step 14:
251 goes into 30 0 times with a remainder of 30.
Record the quotient 0 as the next digit in the result. 
Result so far: 283790.38247
Subtracting 0 from 30 leaves us 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.

Going ahead to step 15:
If we divide 300 by 251, we get 1 and a remainder of 49.
Write down 1 as next digit of the result. 
Result so far: 283790.3824701
If we subtract 251 from 300, we get 49.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

Let's proceed to step 16:
When dividing 490 by 251, we get 1 with a remainder of 239.
The next digit of our result is 1. 
Result so far: 283790.38247011
Deduct 251 from 490 and we're left with 239.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2390, and continue the process.

Our division results in 283790.38247011 with a remaining 2.39e-07.