We're dividing 1551215 by 310 
The aim is to understand the frequency of 310 in 1551215.

Moving on to step 1:
When dividing 1 by 310, we get 0 with a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Take the next digit (5) from the dividend and append it to 1, then repeat: 15 / 310

On to step 2:
If we divide 15 by 310, we get 0 and a remainder of 15.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 15 after subtracting 0 from 15.
Fetch the next digit (5) from the dividend, attach it to 15 and continue: 155 / 310

Let's proceed to step 3:
310 goes into 155 0 times with a remainder of 155.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 155 to get 155.
Append the next digit (1) from the dividend to 155 and continue with: 1551 / 310

Step 4:
The number 310 fits into 1551 5 times, leaving a remainder of 1.
Put 5 as the next digit of the answer. 
Result so far: 5.0
Deduct 1550 from 1551 and we're left with 1.
Append the next digit (2) from the dividend to 1 and continue with: 12 / 310

On to step 5:
The number 310 fits into 12 0 times, leaving a remainder of 12.
Use 0 as the next digit of our solution. 
Result so far: 50.0
If we subtract 0 from 12, we get 12.
Bring next digit (1) of the dividend behind the 12 and repeat the process: 121 / 310

Moving on to step 6:
121 divided by 310 is 0 with a remainder of 121.
Write down 0 as next digit of the result. 
Result so far: 500.0
Subtract 0 from 121 to get 121.
Fetch the next digit (5) from the dividend, attach it to 121 and continue: 1215 / 310

Moving on to step 7:
310 goes into 1215 3 times with a remainder of 285.
The number 3 becomes the next digit in our result. 
Result so far: 5003.0
If we subtract 930 from 1215, we get 285.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2850, and continue the process.

Moving on to step 8:
If we divide 2850 by 310, we get 9 and a remainder of 60.
Use 9 as the next digit of our solution. 
Result so far: 5003.9
Subtract 2790 from 2850 to get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Going ahead to step 9:
600 divided by 310 is 1 with a remainder of 290.
Record the quotient 1 as the next digit in the result. 
Result so far: 5003.91
If we subtract 310 from 600, we get 290.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2900, and continue the process.

Moving on to step 10:
If we divide 2900 by 310, we get 9 and a remainder of 110.
The number 9 becomes the next digit in our result. 
Result so far: 5003.919
Subtract 2790 from 2900 to get 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1100, and continue the process.

Step 11:
If we divide 1100 by 310, we get 3 and a remainder of 170.
The number 3 becomes the next digit in our result. 
Result so far: 5003.9193
Subtract 930 from 1100 to get 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1700, and continue the process.

Moving on to step 12:
310 can be fit into 1700 5 times, resulting in a remainder of 150.
Write down 5 as next digit of the result. 
Result so far: 5003.91935
If we subtract 1550 from 1700, we get 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1500, and continue the process.

Let's proceed to step 13:
1500 divided by 310 is 4 with a remainder of 260.
The next digit of our result is 4. 
Result so far: 5003.919354
Subtract 1240 from 1500 to get 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2600, and continue the process.

Let's proceed to step 14:
The number 310 fits into 2600 8 times, leaving a remainder of 120.
The next digit of our result is 8. 
Result so far: 5003.9193548
The remainder is 120 after subtracting 2480 from 2600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Step 15:
If we divide 1200 by 310, we get 3 and a remainder of 270.
Record the quotient 3 as the next digit in the result. 
Result so far: 5003.91935483
Subtracting 930 from 1200 leaves us with 270.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2700, and continue the process.

After the division, we end up with 5003.91935483 and a remainder of 2.7e-07.