We look at the division of 51308639 by 245 
The aim is to understand the frequency of 245 in 51308639.

On to step 1:
245 goes into 5 0 times with a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Append the next digit (1) from the dividend to 5 and continue with: 51 / 245

On to step 2:
If we divide 51 by 245, we get 0 and a remainder of 51.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 51 after subtracting 0 from 51.
Fetch the next digit (3) from the dividend, attach it to 51 and continue: 513 / 245

On to step 3:
The number 245 fits into 513 2 times, leaving a remainder of 23.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
The remainder is 23 after subtracting 490 from 513.
Bring next digit (0) of the dividend behind the 23 and repeat the process: 230 / 245

Going ahead to step 4:
245 can be fit into 230 0 times, resulting in a remainder of 230.
The next digit of our result is 0. 
Result so far: 20.0
The remainder is 230 after subtracting 0 from 230.
Take the next digit (8) from the dividend and append it to 230, then repeat: 2308 / 245

Let's proceed to step 5:
2308 divided by 245 is 9 with a remainder of 103.
Put 9 as the next digit of the answer. 
Result so far: 209.0
Subtract 2205 from 2308 to get 103.
Grab the next digit (6) from the dividend, add it to 103, then carry on: 1036 / 245

Step 6:
245 can be fit into 1036 4 times, resulting in a remainder of 56.
Put 4 as the next digit of the answer. 
Result so far: 2094.0
If we subtract 980 from 1036, we get 56.
Bring next digit (3) of the dividend behind the 56 and repeat the process: 563 / 245

Advancing to step 7:
245 can be fit into 563 2 times, resulting in a remainder of 73.
Put 2 as the next digit of the answer. 
Result so far: 20942.0
Subtracting 490 from 563 leaves us with 73.
Append the next digit (9) from the dividend to 73 and continue with: 739 / 245

Let's proceed to step 8:
245 can be fit into 739 3 times, resulting in a remainder of 4.
Put 3 as the next digit of the answer. 
Result so far: 209423.0
Subtract 735 from 739 to get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Moving on to step 9:
The number 245 fits into 40 0 times, leaving a remainder of 40.
The next digit of our result is 0. 
Result so far: 209423.0
Subtract 0 from 40 to get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Going ahead to step 10:
245 can be fit into 400 1 times, resulting in a remainder of 155.
The number 1 becomes the next digit in our result. 
Result so far: 209423.01
Subtract 245 from 400 to get 155.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1550, and continue the process.

Advancing to step 11:
245 goes into 1550 6 times with a remainder of 80.
Write down 6 as next digit of the result. 
Result so far: 209423.016
If we take 1470 away from 1550, we end up with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Advancing to step 12:
245 goes into 800 3 times with a remainder of 65.
Record the quotient 3 as the next digit in the result. 
Result so far: 209423.0163
If we subtract 735 from 800, we get 65.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

On to step 13:
245 can be fit into 650 2 times, resulting in a remainder of 160.
Use 2 as the next digit of our solution. 
Result so far: 209423.01632
The remainder is 160 after subtracting 490 from 650.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Moving on to step 14:
If we divide 1600 by 245, we get 6 and a remainder of 130.
Use 6 as the next digit of our solution. 
Result so far: 209423.016326
Deduct 1470 from 1600 and we're left with 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1300, and continue the process.

On to step 15:
1300 divided by 245 is 5 with a remainder of 75.
Record the quotient 5 as the next digit in the result. 
Result so far: 209423.0163265
If we subtract 1225 from 1300, we get 75.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

Advancing to step 16:
The number 245 fits into 750 3 times, leaving a remainder of 15.
Record the quotient 3 as the next digit in the result. 
Result so far: 209423.01632653
Deduct 735 from 750 and we're left with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

After the division, we end up with 209423.01632653 and a remainder of 1.5e-08.