We look at the division of 745421 by 76 
The aim is to understand the frequency of 76 in 745421.

Let's proceed to step 1:
7 divided by 76 is 0 with a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Bring next digit (4) of the dividend behind the 7 and repeat the process: 74 / 76

Let's proceed to step 2:
76 can be fit into 74 0 times, resulting in a remainder of 74.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 74 after subtracting 0 from 74.
Include the next digit (5) from the dividend after 74, then repeat: 745 / 76

Going ahead to step 3:
When dividing 745 by 76, we get 9 with a remainder of 61.
The next digit of our result is 9. 
Result so far: 9.0
If we take 684 away from 745, we end up with 61.
Include the next digit (4) from the dividend after 61, then repeat: 614 / 76

Let's proceed to step 4:
614 divided by 76 is 8 with a remainder of 6.
The number 8 becomes the next digit in our result. 
Result so far: 98.0
Subtract 608 from 614 to get 6.
Take the next digit (2) from the dividend and append it to 6, then repeat: 62 / 76

Step 5:
62 divided by 76 is 0 with a remainder of 62.
Use 0 as the next digit of our solution. 
Result so far: 980.0
Subtracting 0 from 62 leaves us with 62.
Grab the next digit (1) from the dividend, add it to 62, then carry on: 621 / 76

Step 6:
When dividing 621 by 76, we get 8 with a remainder of 13.
The number 8 becomes the next digit in our result. 
Result so far: 9808.0
If we subtract 608 from 621, we get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Moving on to step 7:
If we divide 130 by 76, we get 1 and a remainder of 54.
Put 1 as the next digit of the answer. 
Result so far: 9808.1
Subtract 76 from 130 to get 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Moving on to step 8:
76 can be fit into 540 7 times, resulting in a remainder of 8.
Use 7 as the next digit of our solution. 
Result so far: 9808.17
If we take 532 away from 540, we end up with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Let's proceed to step 9:
76 can be fit into 80 1 times, resulting in a remainder of 4.
Use 1 as the next digit of our solution. 
Result so far: 9808.171
If we subtract 76 from 80, we 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 10:
76 can be fit into 40 0 times, resulting in a remainder of 40.
Put 0 as the next digit of the answer. 
Result so far: 9808.171
The remainder is 40 after subtracting 0 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Advancing to step 11:
When dividing 400 by 76, we get 5 with a remainder of 20.
The number 5 becomes the next digit in our result. 
Result so far: 9808.17105
Subtracting 380 from 400 leaves us with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Advancing to step 12:
When dividing 200 by 76, we get 2 with a remainder of 48.
The number 2 becomes the next digit in our result. 
Result so far: 9808.171052
Subtracting 152 from 200 leaves us with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Moving on to step 13:
480 divided by 76 is 6 with a remainder of 24.
Write down 6 as next digit of the result. 
Result so far: 9808.1710526
Subtracting 456 from 480 leaves us with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Step 14:
If we divide 240 by 76, we get 3 and a remainder of 12.
Record the quotient 3 as the next digit in the result. 
Result so far: 9808.17105263
Deduct 228 from 240 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

The final outcome is 9808.17105263, with a leftover of 1.2e-08.