We look at the division of 30137838 by 349 
The aim is to understand the frequency of 349 in 30137838.

Going ahead to step 1:
3 divided by 349 is 0 with a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Grab the next digit (0) from the dividend, add it to 3, then carry on: 30 / 349

Let's proceed to step 2:
If we divide 30 by 349, we get 0 and a remainder of 30.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 30 to get 30.
Grab the next digit (1) from the dividend, add it to 30, then carry on: 301 / 349

On to step 3:
When dividing 301 by 349, we get 0 with a remainder of 301.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 301 after subtracting 0 from 301.
Append the next digit (3) from the dividend to 301 and continue with: 3013 / 349

Let's proceed to step 4:
349 goes into 3013 8 times with a remainder of 221.
Write down 8 as next digit of the result. 
Result so far: 8.0
Subtracting 2792 from 3013 leaves us with 221.
Fetch the next digit (7) from the dividend, attach it to 221 and continue: 2217 / 349

Step 5:
When dividing 2217 by 349, we get 6 with a remainder of 123.
Use 6 as the next digit of our solution. 
Result so far: 86.0
If we take 2094 away from 2217, we end up with 123.
Fetch the next digit (8) from the dividend, attach it to 123 and continue: 1238 / 349

Going ahead to step 6:
1238 divided by 349 is 3 with a remainder of 191.
Put 3 as the next digit of the answer. 
Result so far: 863.0
Subtract 1047 from 1238 to get 191.
Take the next digit (3) from the dividend and append it to 191, then repeat: 1913 / 349

Advancing to step 7:
If we divide 1913 by 349, we get 5 and a remainder of 168.
The number 5 becomes the next digit in our result. 
Result so far: 8635.0
If we subtract 1745 from 1913, we get 168.
Grab the next digit (8) from the dividend, add it to 168, then carry on: 1688 / 349

On to step 8:
If we divide 1688 by 349, we get 4 and a remainder of 292.
Use 4 as the next digit of our solution. 
Result so far: 86354.0
If we take 1396 away from 1688, we end up with 292.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2920, and continue the process.

Going ahead to step 9:
349 can be fit into 2920 8 times, resulting in a remainder of 128.
Record the quotient 8 as the next digit in the result. 
Result so far: 86354.8
Deduct 2792 from 2920 and we're left with 128.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1280, and continue the process.

Step 10:
If we divide 1280 by 349, we get 3 and a remainder of 233.
The next digit of our result is 3. 
Result so far: 86354.83
The remainder is 233 after subtracting 1047 from 1280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2330, and continue the process.

Moving on to step 11:
349 can be fit into 2330 6 times, resulting in a remainder of 236.
The number 6 becomes the next digit in our result. 
Result so far: 86354.836
Subtracting 2094 from 2330 leaves us with 236.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2360, and continue the process.

Going ahead to step 12:
When dividing 2360 by 349, we get 6 with a remainder of 266.
Use 6 as the next digit of our solution. 
Result so far: 86354.8366
Subtract 2094 from 2360 to get 266.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2660, and continue the process.

The final result is 86354.8366 with a remainder of 0.00266.