We look at the division of 51407210 by 349 
The aim is to understand the frequency of 349 in 51407210.

Step 1:
If we divide 5 by 349, we get 0 and a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Fetch the next digit (1) from the dividend, attach it to 5 and continue: 51 / 349

Advancing to step 2:
When dividing 51 by 349, we get 0 with a remainder of 51.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 51, we end up with 51.
Include the next digit (4) from the dividend after 51, then repeat: 514 / 349

Advancing to step 3:
If we divide 514 by 349, we get 1 and a remainder of 165.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we subtract 349 from 514, we get 165.
Take the next digit (0) from the dividend and append it to 165, then repeat: 1650 / 349

Going ahead to step 4:
349 can be fit into 1650 4 times, resulting in a remainder of 254.
Write down 4 as next digit of the result. 
Result so far: 14.0
Deduct 1396 from 1650 and we're left with 254.
Bring next digit (7) of the dividend behind the 254 and repeat the process: 2547 / 349

On to step 5:
349 goes into 2547 7 times with a remainder of 104.
The next digit of our result is 7. 
Result so far: 147.0
Deduct 2443 from 2547 and we're left with 104.
Bring next digit (2) of the dividend behind the 104 and repeat the process: 1042 / 349

Let's proceed to step 6:
If we divide 1042 by 349, we get 2 and a remainder of 344.
Record the quotient 2 as the next digit in the result. 
Result so far: 1472.0
If we subtract 698 from 1042, we get 344.
Fetch the next digit (1) from the dividend, attach it to 344 and continue: 3441 / 349

Going ahead to step 7:
349 can be fit into 3441 9 times, resulting in a remainder of 300.
The number 9 becomes the next digit in our result. 
Result so far: 14729.0
The remainder is 300 after subtracting 3141 from 3441.
Fetch the next digit (0) from the dividend, attach it to 300 and continue: 3000 / 349

Step 8:
If we divide 3000 by 349, we get 8 and a remainder of 208.
The next digit of our result is 8. 
Result so far: 147298.0
If we subtract 2792 from 3000, we get 208.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2080, and continue the process.

Let's proceed to step 9:
The number 349 fits into 2080 5 times, leaving a remainder of 335.
The number 5 becomes the next digit in our result. 
Result so far: 147298.5
Subtract 1745 from 2080 to get 335.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3350, and continue the process.

Going ahead to step 10:
If we divide 3350 by 349, we get 9 and a remainder of 209.
The next digit of our result is 9. 
Result so far: 147298.59
The remainder is 209 after subtracting 3141 from 3350.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2090, and continue the process.

Moving on to step 11:
The number 349 fits into 2090 5 times, leaving a remainder of 345.
The number 5 becomes the next digit in our result. 
Result so far: 147298.595
Deduct 1745 from 2090 and we're left with 345.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3450, and continue the process.

Going ahead to step 12:
When dividing 3450 by 349, we get 9 with a remainder of 309.
Record the quotient 9 as the next digit in the result. 
Result so far: 147298.5959
Deduct 3141 from 3450 and we're left with 309.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3090, and continue the process.

Let's proceed to step 13:
The number 349 fits into 3090 8 times, leaving a remainder of 298.
Write down 8 as next digit of the result. 
Result so far: 147298.59598
If we subtract 2792 from 3090, we get 298.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2980, and continue the process.

Step 14:
349 goes into 2980 8 times with a remainder of 188.
The number 8 becomes the next digit in our result. 
Result so far: 147298.595988
The remainder is 188 after subtracting 2792 from 2980.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1880, and continue the process.

The final result is 147298.595988 with a remainder of 1.88e-05.