We look at the division of 51449083 by 354 
The aim is to understand the frequency of 354 in 51449083.

Step 1:
5 divided by 354 is 0 with a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Include the next digit (1) from the dividend after 5, then repeat: 51 / 354

Step 2:
51 divided by 354 is 0 with a remainder of 51.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 51, we end up with 51.
Grab the next digit (4) from the dividend, add it to 51, then carry on: 514 / 354

Advancing to step 3:
514 divided by 354 is 1 with a remainder of 160.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
The remainder is 160 after subtracting 354 from 514.
Bring next digit (4) of the dividend behind the 160 and repeat the process: 1604 / 354

Moving on to step 4:
1604 divided by 354 is 4 with a remainder of 188.
Record the quotient 4 as the next digit in the result. 
Result so far: 14.0
If we subtract 1416 from 1604, we get 188.
Include the next digit (9) from the dividend after 188, then repeat: 1889 / 354

On to step 5:
If we divide 1889 by 354, we get 5 and a remainder of 119.
Write down 5 as next digit of the result. 
Result so far: 145.0
If we take 1770 away from 1889, we end up with 119.
Take the next digit (0) from the dividend and append it to 119, then repeat: 1190 / 354

Step 6:
The number 354 fits into 1190 3 times, leaving a remainder of 128.
The next digit of our result is 3. 
Result so far: 1453.0
If we take 1062 away from 1190, we end up with 128.
Append the next digit (8) from the dividend to 128 and continue with: 1288 / 354

Moving on to step 7:
354 goes into 1288 3 times with a remainder of 226.
Write down 3 as next digit of the result. 
Result so far: 14533.0
Deduct 1062 from 1288 and we're left with 226.
Bring next digit (3) of the dividend behind the 226 and repeat the process: 2263 / 354

Let's proceed to step 8:
354 can be fit into 2263 6 times, resulting in a remainder of 139.
Use 6 as the next digit of our solution. 
Result so far: 145336.0
If we take 2124 away from 2263, we end up with 139.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1390, and continue the process.

Step 9:
354 can be fit into 1390 3 times, resulting in a remainder of 328.
Write down 3 as next digit of the result. 
Result so far: 145336.3
Subtract 1062 from 1390 to get 328.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3280, and continue the process.

Step 10:
The number 354 fits into 3280 9 times, leaving a remainder of 94.
The number 9 becomes the next digit in our result. 
Result so far: 145336.39
Subtracting 3186 from 3280 leaves us with 94.
Since there are no more digits in the dividend, we add a zero to the remainder making it 940, and continue the process.

Advancing to step 11:
The number 354 fits into 940 2 times, leaving a remainder of 232.
Record the quotient 2 as the next digit in the result. 
Result so far: 145336.392
If we subtract 708 from 940, we get 232.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2320, and continue the process.

Moving on to step 12:
When dividing 2320 by 354, we get 6 with a remainder of 196.
Record the quotient 6 as the next digit in the result. 
Result so far: 145336.3926
Deduct 2124 from 2320 and we're left with 196.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1960, and continue the process.

Step 13:
The number 354 fits into 1960 5 times, leaving a remainder of 190.
Put 5 as the next digit of the answer. 
Result so far: 145336.39265
Subtract 1770 from 1960 to get 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1900, and continue the process.

Let's proceed to step 14:
354 goes into 1900 5 times with a remainder of 130.
Write down 5 as next digit of the result. 
Result so far: 145336.392655
If we subtract 1770 from 1900, we get 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1300, and continue the process.

After the division, we end up with 145336.392655 and a remainder of 1.3e-05.