377820 ÷ 51 
The aim is to understand the frequency of 51 in 377820.

Step 1:
When dividing 3 by 51, we get 0 with a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Fetch the next digit (7) from the dividend, attach it to 3 and continue: 37 / 51

Going ahead to step 2:
When dividing 37 by 51, we get 0 with a remainder of 37.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 37 leaves us with 37.
Grab the next digit (7) from the dividend, add it to 37, then carry on: 377 / 51

Advancing to step 3:
When dividing 377 by 51, we get 7 with a remainder of 20.
Record the quotient 7 as the next digit in the result. 
Result so far: 7.0
The remainder is 20 after subtracting 357 from 377.
Fetch the next digit (8) from the dividend, attach it to 20 and continue: 208 / 51

On to step 4:
208 divided by 51 is 4 with a remainder of 4.
Write down 4 as next digit of the result. 
Result so far: 74.0
The remainder is 4 after subtracting 204 from 208.
Take the next digit (2) from the dividend and append it to 4, then repeat: 42 / 51

On to step 5:
42 divided by 51 is 0 with a remainder of 42.
Use 0 as the next digit of our solution. 
Result so far: 740.0
If we subtract 0 from 42, we get 42.
Bring next digit (0) of the dividend behind the 42 and repeat the process: 420 / 51

Moving on to step 6:
The number 51 fits into 420 8 times, leaving a remainder of 12.
The number 8 becomes the next digit in our result. 
Result so far: 7408.0
The remainder is 12 after subtracting 408 from 420.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Advancing to step 7:
51 can be fit into 120 2 times, resulting in a remainder of 18.
Use 2 as the next digit of our solution. 
Result so far: 7408.2
The remainder is 18 after subtracting 102 from 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Moving on to step 8:
When dividing 180 by 51, we get 3 with a remainder of 27.
Put 3 as the next digit of the answer. 
Result so far: 7408.23
Deduct 153 from 180 and we're left with 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Advancing to step 9:
51 goes into 270 5 times with a remainder of 15.
Put 5 as the next digit of the answer. 
Result so far: 7408.235
Subtract 255 from 270 to get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Step 10:
When dividing 150 by 51, we get 2 with a remainder of 48.
Write down 2 as next digit of the result. 
Result so far: 7408.2352
If we subtract 102 from 150, we get 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Advancing to step 11:
If we divide 480 by 51, we get 9 and a remainder of 21.
Record the quotient 9 as the next digit in the result. 
Result so far: 7408.23529
If we take 459 away from 480, we end up with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Let's proceed to step 12:
The number 51 fits into 210 4 times, leaving a remainder of 6.
The number 4 becomes the next digit in our result. 
Result so far: 7408.235294
If we take 204 away from 210, we end up with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Step 13:
60 divided by 51 is 1 with a remainder of 9.
The number 1 becomes the next digit in our result. 
Result so far: 7408.2352941
Subtracting 51 from 60 leaves us with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Step 14:
90 divided by 51 is 1 with a remainder of 39.
The number 1 becomes the next digit in our result. 
Result so far: 7408.23529411
Deduct 51 from 90 and we're left with 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

In conclusion, the division gives 7408.23529411 with a balance of 3.9e-08.