We look at the division of 51523708 by 344 
The aim is to understand the frequency of 344 in 51523708.

Moving on to step 1:
When dividing 5 by 344, we get 0 with a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Grab the next digit (1) from the dividend, add it to 5, then carry on: 51 / 344

Moving on to step 2:
344 can be fit into 51 0 times, resulting in a remainder of 51.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 51 leaves us with 51.
Take the next digit (5) from the dividend and append it to 51, then repeat: 515 / 344

Going ahead to step 3:
344 can be fit into 515 1 times, resulting in a remainder of 171.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtract 344 from 515 to get 171.
Grab the next digit (2) from the dividend, add it to 171, then carry on: 1712 / 344

Going ahead to step 4:
When dividing 1712 by 344, we get 4 with a remainder of 336.
The next digit of our result is 4. 
Result so far: 14.0
Deduct 1376 from 1712 and we're left with 336.
Grab the next digit (3) from the dividend, add it to 336, then carry on: 3363 / 344

Going ahead to step 5:
The number 344 fits into 3363 9 times, leaving a remainder of 267.
The number 9 becomes the next digit in our result. 
Result so far: 149.0
If we subtract 3096 from 3363, we get 267.
Append the next digit (7) from the dividend to 267 and continue with: 2677 / 344

Going ahead to step 6:
344 goes into 2677 7 times with a remainder of 269.
The number 7 becomes the next digit in our result. 
Result so far: 1497.0
Subtract 2408 from 2677 to get 269.
Grab the next digit (0) from the dividend, add it to 269, then carry on: 2690 / 344

Let's proceed to step 7:
344 can be fit into 2690 7 times, resulting in a remainder of 282.
Put 7 as the next digit of the answer. 
Result so far: 14977.0
If we take 2408 away from 2690, we end up with 282.
Append the next digit (8) from the dividend to 282 and continue with: 2828 / 344

On to step 8:
The number 344 fits into 2828 8 times, leaving a remainder of 76.
The next digit of our result is 8. 
Result so far: 149778.0
Deduct 2752 from 2828 and we're left with 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Step 9:
If we divide 760 by 344, we get 2 and a remainder of 72.
Record the quotient 2 as the next digit in the result. 
Result so far: 149778.2
Subtracting 688 from 760 leaves us with 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Going ahead to step 10:
344 goes into 720 2 times with a remainder of 32.
Record the quotient 2 as the next digit in the result. 
Result so far: 149778.22
Subtracting 688 from 720 leaves us with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

The final outcome is 149778.22, with a leftover of 0.032.