We divide 87213822 by 260
The aim is to understand the frequency of 260 in 87213822.

Advancing to step 1:
The number 260 fits into 8 0 times, leaving a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Grab the next digit (7) from the dividend, add it to 8, then carry on: 87 / 260

Moving on to step 2:
87 divided by 260 is 0 with a remainder of 87.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 87 and we're left with 87.
Include the next digit (2) from the dividend after 87, then repeat: 872 / 260

Advancing to step 3:
260 goes into 872 3 times with a remainder of 92.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
Subtracting 780 from 872 leaves us with 92.
Fetch the next digit (1) from the dividend, attach it to 92 and continue: 921 / 260

Moving on to step 4:
260 goes into 921 3 times with a remainder of 141.
Put 3 as the next digit of the answer. 
Result so far: 33.0
If we take 780 away from 921, we end up with 141.
Include the next digit (3) from the dividend after 141, then repeat: 1413 / 260

Step 5:
260 can be fit into 1413 5 times, resulting in a remainder of 113.
Put 5 as the next digit of the answer. 
Result so far: 335.0
If we subtract 1300 from 1413, we get 113.
Bring next digit (8) of the dividend behind the 113 and repeat the process: 1138 / 260

Moving on to step 6:
1138 divided by 260 is 4 with a remainder of 98.
Put 4 as the next digit of the answer. 
Result so far: 3354.0
Subtracting 1040 from 1138 leaves us with 98.
Fetch the next digit (2) from the dividend, attach it to 98 and continue: 982 / 260

Let's proceed to step 7:
260 can be fit into 982 3 times, resulting in a remainder of 202.
Put 3 as the next digit of the answer. 
Result so far: 33543.0
Subtract 780 from 982 to get 202.
Fetch the next digit (2) from the dividend, attach it to 202 and continue: 2022 / 260

Going ahead to step 8:
When dividing 2022 by 260, we get 7 with a remainder of 202.
Use 7 as the next digit of our solution. 
Result so far: 335437.0
If we subtract 1820 from 2022, we get 202.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2020, and continue the process.

Step 9:
260 goes into 2020 7 times with a remainder of 200.
Put 7 as the next digit of the answer. 
Result so far: 335437.7
Deduct 1820 from 2020 and we're left with 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Advancing to step 10:
The number 260 fits into 2000 7 times, leaving a remainder of 180.
The number 7 becomes the next digit in our result. 
Result so far: 335437.77
If we take 1820 away from 2000, we end up with 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1800, and continue the process.

The final outcome is 335437.77, with a leftover of 0.18.