We look at the division of 77379689 by 253 
The aim is to understand the frequency of 253 in 77379689.

Moving on to step 1:
When dividing 7 by 253, we get 0 with a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Fetch the next digit (7) from the dividend, attach it to 7 and continue: 77 / 253

Moving on to step 2:
If we divide 77 by 253, we get 0 and a remainder of 77.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 77 after subtracting 0 from 77.
Fetch the next digit (3) from the dividend, attach it to 77 and continue: 773 / 253

On to step 3:
253 can be fit into 773 3 times, resulting in a remainder of 14.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
If we take 759 away from 773, we end up with 14.
Include the next digit (7) from the dividend after 14, then repeat: 147 / 253

Let's proceed to step 4:
253 goes into 147 0 times with a remainder of 147.
Put 0 as the next digit of the answer. 
Result so far: 30.0
Subtract 0 from 147 to get 147.
Fetch the next digit (9) from the dividend, attach it to 147 and continue: 1479 / 253

Moving on to step 5:
The number 253 fits into 1479 5 times, leaving a remainder of 214.
The number 5 becomes the next digit in our result. 
Result so far: 305.0
Subtracting 1265 from 1479 leaves us with 214.
Bring next digit (6) of the dividend behind the 214 and repeat the process: 2146 / 253

Step 6:
When dividing 2146 by 253, we get 8 with a remainder of 122.
Use 8 as the next digit of our solution. 
Result so far: 3058.0
Subtract 2024 from 2146 to get 122.
Fetch the next digit (8) from the dividend, attach it to 122 and continue: 1228 / 253

On to step 7:
1228 divided by 253 is 4 with a remainder of 216.
The next digit of our result is 4. 
Result so far: 30584.0
If we take 1012 away from 1228, we end up with 216.
Bring next digit (9) of the dividend behind the 216 and repeat the process: 2169 / 253

Advancing to step 8:
The number 253 fits into 2169 8 times, leaving a remainder of 145.
Use 8 as the next digit of our solution. 
Result so far: 305848.0
The remainder is 145 after subtracting 2024 from 2169.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1450, and continue the process.

Moving on to step 9:
253 goes into 1450 5 times with a remainder of 185.
Record the quotient 5 as the next digit in the result. 
Result so far: 305848.5
Subtracting 1265 from 1450 leaves us with 185.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1850, and continue the process.

Let's proceed to step 10:
253 can be fit into 1850 7 times, resulting in a remainder of 79.
Use 7 as the next digit of our solution. 
Result so far: 305848.57
If we subtract 1771 from 1850, we get 79.
Since there are no more digits in the dividend, we add a zero to the remainder making it 790, and continue the process.

Let's proceed to step 11:
If we divide 790 by 253, we get 3 and a remainder of 31.
Use 3 as the next digit of our solution. 
Result so far: 305848.573
The remainder is 31 after subtracting 759 from 790.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

Advancing to step 12:
253 can be fit into 310 1 times, resulting in a remainder of 57.
Use 1 as the next digit of our solution. 
Result so far: 305848.5731
Subtract 253 from 310 to get 57.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

Step 13:
253 goes into 570 2 times with a remainder of 64.
The number 2 becomes the next digit in our result. 
Result so far: 305848.57312
If we subtract 506 from 570, we get 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Moving on to step 14:
253 can be fit into 640 2 times, resulting in a remainder of 134.
Put 2 as the next digit of the answer. 
Result so far: 305848.573122
Deduct 506 from 640 and we're left with 134.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1340, and continue the process.

The final outcome is 305848.573122, with a leftover of 1.34e-05.